micro chapter 12

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Algae

Are Unicellular, Colonial, or have simple Multicellular Bodies (Thalli)

___________are formed by the fragmentation of septate hyphae into single, slightly thickened cells

Arthroconidia

Sexual, asexual

Ascospores differ from conidia in the manner that, ascospores are BLANK, and conidia are BLANK

Mitosis followed by Cytokinesis

Asexual Reproduction in Unicellular Algae involves what?

Phaeophyta

Brown Algae Contains xanthophylls, laminarin, and oils. They have cell walls composed of cellulose and alginic acid, which is another thickening agent. A brown algal spore is motile by means of one "hairy" flagellum and one whiplike flagellum.

Phaeophyta

Brown Algea

An organism that uses organic molecules as a source of carbon and energy is called

Chemoheterotrophic

Name the Green Algae

Chlorophyta

plant-like store sugar starch as food 18S rRNA cholrophylls live in freshwater seasoning pepper /Codium

Chlorophyta (Green Algae)

Name the Golden Yellow Algea

Chrysophyta

this Algae is most diverse in cell wall structure but uniform in use of the polysaccharide

Chrysophyta, the golden algae

Cellular Slime Molds

Composed of myxamoebae that phagocytize bacteria and yeast.

Lichens composed of fungi living in partnership with 2 types of photosynthetic microbes, called

Cyanobacteria and green algae

Amanita sp.

Example of a highly toxic mushroom from the Basidiomycota division of fungi (AKA "Death Cap")

what are 3 ways humans use Fungi?

Food, beverages, and pharmacauticals

Cercozoa

Foraminifera

Claviceps purpurea

Fungal Plant Pathogen from the Ascomycota division of fungi that grows on grain and forms the toxin LSD (which causes abortions in cattle and Hallucinogen in humans)

Thallus

Fungal body

Chitin

Fungal cell wall component

Ascospore

Fungal spore formed in sac

Basisiospore

Fungal spore formed ub club shaped hyphae

True

Fungi are more resistant to osmotic pressure than bacteria, True or False.

these are all chracteristics of what? Chemoheterotrophic Chitin/ Cell wall Lack Chlorophyll (no photosynthesis)

Fungi-characteristics

Lichen

Fungus + Algea or bacterium

Chrysophyta

Golden Algae yellow-green algaem and diatoms contain chrysolaminarin as a storage product. The silica cell walls of diatoms are arranged in nesting halves called frustules.

Chlorophyta

Green Algea

Sexual reproduction in Fungi

Haploid cells form a (+) Thallus and a (-) Thallus that fuse to form a Dikaryon, eventually, 2 Haploid nuclei fuse within the Dikaryon forming a diploid nucleus, which undergoes Meiosis to form 2 haploid nuclei; Some then develop into (+) spores or (-) spores and on into (+) or (-) Thalli

a structure of a parasitic plant or fungus that penetrates host tissues to obtain food and water

Haustoria

Algae

Have Accessory Photosynthetic pigments that trap light energy and pass it to Chlorophyll a (a Primary Pigment)

Deuteromycetes

Heterogeneous collection of fungi whose sexual stages are unknown, although an analysis of their rRNA sequences indicates that most belng in the Ascomycota division

from other living organisms via modified hyphea called haustoria

How do other fungi get nutrients?

Fragmentation

How may Multicellular Algae reproduce asexually?

Lichens

Important in the creation of soil from rocks; eaten by many animals; used in the production of foods, dyes, clothing, perfumes, and medicines

what are the 4 classes of Protozoa?

Parabasala Alveolates Amoebozoa Euglenozoa

what is a well known pond water ciliate?

Paramecium

Entamoeba histolytica

Pathogenic Protozoan Amoeba; carried with no symptoms in G.I. tract of about 10% of population; may spread via blood, and cause lesions in the liver, spleen, lungs, kidneys, and brain; usually fatal if untreated; spread by ingestion of fecally-contaminated water or food, or oral-anal sex

Acanthamoeba sp. and Naegleria sp.

Pathogenic Protozoan Amoeba; usually free-living in sediments of warm freshwater; may cause fatal brain infections; enter through broken skin or mucosa (A.), or intact nasal mucosa (N.); death a few days to a few weeks after neurological symptoms appear

Cryptosporidium parvum

Pathogenic Protozoan Apicomplexan; carried in G.I. tract with no symptoms in up to about 30% of the population; spread by fecally contaminated water (especially around livestock), or direct fecal-oral transmission

Plasmodium sp.

Pathogenic Protozoan Apicomplexan; causes Malaria; parasite multiplies and destroys red blood cells and liver cells

Toxoplasma gondii

Pathogenic Protozoan Apicomplexan; up to 40% of U.S. population may be infected, also occurs in many mammals and birds; usually acquired by ingesetion of poorly-cooked meat, but also from fecally-contaminated soil or plants (especially by cats)

Balantidium coli

Pathogenic Protozoan Ciliate (the only one); usually occurs in pigs; also in rodents and primates

Zygomycota

Most are Saprobes; the rest are obligate parasites of insects and other fungi; they reproduce sexually by forming Zygosporangia; Examples include Rhizopus nigricans, Nosema sp., and Microsporidium sp.

Algae

Most are aquatic, living in the Photic Zone (that penetrated by sunlight) of fresh, brackish, and salt water

helps roots grow

Mycorrhizae

fungi are known to do what at the root of plants?

Mycorrhizae (help roots grow)

what are 2 Ameobozoas that cause brain disease?

Naegleria and Acanthamoeba

Gymnodinium sp. and Gonyaulax sp.

Pathogenic Protozoan Dinoflagellate; produce Neurotoxins; when present in abundance in marine waters they cause "Red Tide" resulting in large fish die-offs

Pfiesteria sp.

Pathogenic Protozoan Dinoflagellate; produces VERY potent neurotoxin that may cause illness from handling infected fish or inhaling contaminated air

Trypanosoma brucei

Pathogenic Protozoan Flagellate; causes African Sleeping Sickness; spread by bite of infected Tsetse Fly feeding on domestic or wild animal reservoirs

Name the Red Algae

Rhodophyta (red)

_________contains the pigment phycoerythrin, the storage molecule glycogen, and cell walls of agar or carrageenan

Rhodophyta-Red Algae

this algae is used as a thickening agent in microbiology media & foods like ice cream, toothpaste, syrups; salad dressing

Rhodophyta-Red Algae

protozoan asexual reproduction within red blood & liver cells

Schizogony

branched, tubular filaments with crosswalls found in large fungi

Septate hyphae

Algae

Simple, Eukaryotic, Phototrophic organisms that carry out Oxygenic Photosynthesis using Chlorophyll a (to capture the energy of light); have sexual reproductive structure; and differ widely in distribution, morphology, reproduction, and biochemical traits

Cutaneous L.

"Baghdad Boil"; results in painless skin ulcers usually with scarring due to bacterial infection

Fungi; 3 types of asexual spores formation

Sporangiospores Chlamydospores Conidiospores a. Arthroconidia b. blastoconidia

Which taxon is characterized by "hairy" flagella?

Stramenopila

Pfiesteria sp.

Symptoms: Confusion, memory loss, headache, breathing difficulty, skin rash, muscle cramps, vomiting, and diarrhea

Toxoplasma gondii

Symptoms: Usually asymptomatic, except in the immunocompromised, or fetus where can cause severe brain damage and blindness

Plasmodium

apicomplexa which causes malaria, transmitted through mosquitoes to humans

Cryptosporidium

apicomplexa, causes diarrhea, transmitted to humans through feces of cows, rodents, dogs and cats

alveolates called ______ are all pathogens of animals

apicomplexans

Trichomonas vaginalis

archaezoa infection, found in the female vagina and male urinary tract

Ticks and mites (chiggers)

are acrachnids (8 legged arthropods)

More

are bacterial endospores more or less tolerant to extreme environmental issues than fungal spores?

True

are fungi capable of metabolizing complex carbohydrates? True or False?

Yes

are sterols present in cell membrane of fungi?

how do euglenoids store food?

as a polysaccharide called paramylon

the sac in ascomycetes in which the sexual spores are formed.

asci

without crosswalls, (undivided) and coenocytic, (contain many nuclei, not separated by cell walls)

aseptate hyphae

reproduction of fungi is asexual or sexual?

asexual

do fungi reproduce mostly; sexually or asexually?

asexually (without sex)

Multicellular algae typically reproduce in two ways, what are they?

asexually by fragmentation or sexually by an alternation of generations

where are Condiospores produced?

at tips or sides of hyphae, but not within a sac

what do Cellular slime molds composed of myamoebae phagocytize?

bacteria and yeasts

what are the 4 benefits of Ascomycetes?

baking, brewing, research, and pharmaceuticals.

tightly woven hyphae that extend into multiple projections at ends

basidia

Mushrooms and other fruiting bodies of basidiomycetes are called this

basidiocarps

what are the ends called of basidia that produce sexually?

basidiospores

Rhizopus nigricans

black bread mold; example of a fungus from the Zygomycota division of fungi

buds coming off the parent cell are called?

blastoconidia

Hemoflagellates

blood parasites, transmitted by blood-feeding insects, found in circulatory system of host

Thallus

body of a mold or fleshy fungus

Unicellular Algae reproduce sexually or asexually?

both

what do slime molds lack?

cell walls

what are the two types of slime molds ?

cellular and plasmodial

water molds have cell walls of ______

cellulose

basidiomycetes decompose what 2 things from dead plants?

cellulose and lignin

what does the name of the group apicomplexans refer to?

complex (group) of special organelles that infect at the apex

Asexual spores

conidia, arthroconidia, blastoconidia, chlamydoconidia, sporangiospores

The type of asexual fungal spore that buds from vegetative hyphae is called a

conidiospore

Haploid nuclei

contains one set of chromosomes

Crustose

cover substrate and may grow into it

Septa

cross-walls in Septate hyphae

many protozoa have a hardy resting stage called a _____, which is characterized by a thick capsule and a low metabolic rate.

cyst

what do fungi decompose and recycle?

dead organisms; recycle nutrients

Water molds ______ dead animals and return _______ to the environment

decompose nutrients

Mosquito

definitive host of malaria

Keratin

dermatophytes secrete enzyme keratinase to degrade what protein found in skin, hair and nails?

fungi having no known sexual stage are called

deuteromycetes

2 haploid nuclei, forming new spores (referring to sexual reproduction in fungus)

dikaryon

two forms of growth

dimorphic

fungi that can grow as a mold or a yeast are called

dimorphic fungi-(meaning two)

unicellular algae; make up most freshwater and marine plankton responsible for red tides; bioluminescent

dinoflagellates

what do Amoebozoas cause?

disease in brains of humans and animals that swim in water containing them

Mycoses

diseases of plants and animals, including humans that 30% of fungi cause

Zygomycota

division of fungi having sexually produced rough walled zygosporangia.

No

do fungal spores have the same properties and characteristics as bacterial endospores

True

does algae use photosynthesis to produce nutrition, True or False?

Lichens are organisms that are important how?

economically and environmentally

Lichens

economically and environmentally important organisms composed of fungi living in partnership with photosynthetic microbes, either green algae or cyanobacteria.

Parabasalids

eg. Trichomonas/ are characterized by a Golgi body-like structure called a parabasal body.

Pseudopods

extending blunt, lobelike projections of amoebas used to move

Trematodes

flukes, type of platyhelminths, flat, leaf-shaped bodies with ventral and oral suckers to keep them in place, obtain food through outer cuticle (outer layer)

leaflike lichens that grow free from the substrate

foliose

Ascomycetes include most of the fungi that spoil what?

food

Spores

formation of BLANK leads to both sexual and asexual reproduction in fungi

Sexual Reproduction of a few protozoa

forming gametocytes (gamete) that fuse with one another to form a diploid zygote.

T. brucei rhodesiense

found in east and south Africa

T. brucei gambiense

found in west Africa

mushrooms small visible extensions are called what?

fruiting bodies

cillica cell wall of a Diatom is called

frustules

lichen shape that is erect or hanging cylinder-like

fruticose

what are the 3 shapes of lichen?

fruticose crustose foliose

30% of Fungi produce mycoses. What is mycoses?

fungal diseases of plants animals and humans

Superficial mycoses

fungal infections along the hair shafts and top layer epidermal cells

Subcutaneous mycoses

fungal infections beneath the skin caused by saprophytic fungi living in soil and vegetation

Systemic mycoses

fungal infections deep within the body, usually from fungi living in soil, inhalation of spores

Cutaneous mycoses

fungal infections of the epidermis, hair and nails; also known as dermatophytes

Ringworm

fungal skin infection, causes itchy red raised scaly patches of skin that can blister or ooze

Aerobic or facultatively anaerobic

fungi are usually BLANK in terms of their oxygen needs and use

Basidiomycota are also known as

fungi, mushrooms

haploid (1n, single nucleaus) sex cells

gametes/gametocytes

Opportunistic pathogen

generally harmless in its normal habitat, but can become pathogenic in a host who is seriously debilitated or traumatized

Chrysolaminarin us a storage product found in which group of microbes?

golden algea

what color algae is Chrysophyta

golden, yellow green algae

crustose are lichens that

grow appressed to their substrates

what is a harmful result in basidiomycetes decomposition?

hallucinatory chemicals or toxins.

appendage of a parasitic fungus that penetrates host's tissue to withdraw nutrients

haustoria

Alveolates

have cavities beneath their cell surfaces called alveoli, include ciliate alveolates (cilia), apicomplexans (all are pathogenic), and dinoflagellates (responsible for red tides).

Parasitic Helminths

have microscopic infective and diagnostic stages - usually eggs or larvae

Water Molds

have tubular cristae in their mitochondria, cell walls of cellulose, spores having two different flagella, and diploid thalli.

anchor seaweed bodies to rocks

holdfasts

Basidiomycota

include mushrooms, puffballs, and bracket fungi, produce basidiospores at ends of basidia.

Helminth characteristics

lack a digestive system, nervous system reduced, locomotion reduced or completely lacking, reproductive system is often complex

Deuteromycota

large and heterogeneous form division of fungi comprising forms for which no sexually reproductive stage is known

Chlorophyta

large division of chiefly freshwater eukaryotic algae that possess chlorophyll a and b, store food as starch, and cellulose cell walls

Ascaris

large nematode, sexual dimorphism, lives in the small intestines of humans exclusively; feeds on semidigested food, infects children when playing in dirt

Foliose

leaflike with margins free of substrate

Hookworms

live in small intestines of humans, eggs are excreted in feces, enters host by penetrating hosts skin (feet), wear shoes to prevent, eventually moves to blood and lymph vessels, then to lungs

Hyphae

long, branched, tubular filaments

Dutch Elm Diseases and Chestnut Blight

these are fungal plant pathogens caused by members of the Ascomycota division of fungi

Thallus

vegetative (nutrient-obtaining) body of fungus; in yeasts, it is unicellular, small, and globular; in molds, it is large and composed of Hyphae

how do zygosporangia develop?

via fusion of sexually compatible hyphae following meiosis

Mycelium

visible to the naked eye, hyphae grow into a filamentous mass

Sexual dimorphism

male and female worms look distinctly different

Roundworms

members of phyla nematoda, cylindrical in shape, have complete digestive systems, some free-living, some live off of host

what do Parabasala lack?

mitochondria

A nucleus that has replicated its DNA divides via a process called , _______

mitosis

Haustoria

modified Hyphae that penetrate host tissue; they allow some fungi to derive nutrients from living plants and animals

Ascomycota

molds and yeasts that are characterized by the formation of haploid ascospores within sacs calles asci. PCN Truffles

Plasmodium vivax

most common form of malaria, life cycle is very quick, sometimes referred to as "dormant malaria," develops in mosquitoes at lower temperature

Plasmodium falciparum

most dangerous form of malaria, very recent form or malaria making it more dangerous because humans haven't had a chance for our bodies to become used to this form of malaria, referred to as "malignant malaria"

Saprobes

most fungi are these- they absorb nutrients from dead organisms

Cytostome

mouthlike opening of ciliates; used to ingest food

Entamoeba histolytica

only pathogenic amoeba found in the human intestine, causes amoebic dysentry, transmitted human to human by eating the cysts in infected feces

what is the nutrition of a slime mold?

phagocytic

Algae are aquatic and live in what zone?

photic zone (fresh & salt water)

the characteristics of euglenoids are __________,_________ and _________

photoautotrophic, unicellular, chloroplasts

Algae, like plants use _________

photosenthesis

Who studies Algea

phycologists

study of algae is called

phycology

The study of algae is called ________

phycology.

Protozoans are critical members of this free-living drifting organism, that forms the basis of the aquatic food chain; name this protozoan organism

plankton

5 apicomplexa human parasites

plasmodium, babesia microti, toxoplasma gondii, cryptosporidium, cyclospora cayetanensis

buoyes that are gas-filled bulbs of seaweeds/algae

pneumocysts

Reproductive or aerial hyphae

portion of hypha concerned with reproduction

Vegetative hypha

portion of hypha which contains nutrients

Carrageenan is found in the cell walls of which group of algae?

red algea

Crossing over

results in genetic variation

Mucocutaneous L.

results in skin, oral, and nasal mucous membrane ulcers with permanent disfiguring damage

what is zygosporangia ?

rough-walled sexual structures of the fungi zygomyocota

Sporangium

sac at the end of of an aerial hypha (sporangiophore)

Ascomycota include what?

sac fungi, molds & yeasts

Organism that obtain food from dead organisms, all fungi are this

saprobes

Organisms that obtain food from decaying organic matter

saprobes

Zygomycota are mostly________

saprobes

Phytophthora infestans

water mold plant pathogen that infected and devastated potato crop in Ireland resulting in the great famine there and major Irish immigration to U.S. and Canada

Aerobic heterotrophs

what category are protozoa in in terms of nutrition?

Asexual and sexual

what forms of reproduction are done by fungi?

Chlorophyll a

what is responsible for the photosynthesis in algae?

what do Euglenoids have that helps maintain shape?

semi-rigid, proteinaceous, helical (spiral) shaped pellicle

crosswalls of molds

septa

Branched, tubular filaments with crosswalls found in large fungi are

septate hyphae

The stemlike portion of a seaweed is called its

stipe

the stem-like portion of seaweed algae

stipe

Mycology

study of fungi

Fungi important research tools for what?

study of metabolism, growth, and development

Cestodes

tapeworms, type of platyhelminths, intestinal parasites, do not ingest tissues of host, lack digestive system, absorb food through cuticle

Apicomplexa

which category of protozoa produce oocysts?

Fungi

which needs less nitrogen to grow, fungi or bacteria?

body of a mold or fleshy fungus

thallus

what is the vegetative (non-reproductive) body of a fungus called?

thallus

Hyphae

thallus consisting of long filaments of cells joined together

Intermediate host

the host in which the parasite undergoes asexual reproduction

how do Chlamydospores form?

with a thickened cell wall INSIDE hyphae

Cryptococcus neoformans

yeast that is the leading cause of fungal meningitis (Basidiomycota division example)

Budding yeasts

yeasts that divide unevenly, saccharomyces

Chrysophyta

yellow-green algea

do fungi have cell walls?

yes

Fungi in the division Zygomycota are coencentric molds, what are these molds called?

zygomycetes

Rhizopus

zygomycota/conjugation fungi, example of mycosis is black bread mold, produces sporangiospores (asexual spores)

what is the distinctive feature of a zygomycetes?

zygosporangia

fertilized egg, diploid (2 sets of chromo's) cell formed from a gamete

zygote

A cyst

a resting stage that is resilient to environmental changes, formed by some protozoa.

Mycelium

a tangled mass of hyphae

a haploid thallus alternates with a diploid thallus what is this called?

alternation of generations

A phycologist studies what?

alternations of generations in algae

7 Classifications of Protazoa

alveolates, cercozoa, radiolaria, amoebozoa, euglenozoa, diplomonads, and parabasalids.

Arthropods

animals characterized by segmented bodies, hard external skeletons, and jointed legs

Vectors

animals such as ticks, lice, flies, and mosquitos that carry and transmit microscopic pathogens from host to host

Anthropod Vectors

animals that carry and transmit pathogens.

Cyclospora cayetanensis

apicomplexa similar to cryptosporidium, responsible for 300 cases of diarrhea associated with snow peas in the US and Canada

Giardia intestinalis

(G. lamblia)- causes one of the more common water-borne G.I. tract diseases in the U.S.

Eukaryotic Nuclues

-Can be Haploid (having a single copy of each chromosome) or Diploid (having two copies) -Divides by mitosis in four phases resulting in two nuclei with the same ploidy(# of sets of chromosomes) as the original.

Classification of Eukaryotic Microbes

-Problematic and changed frequently - Historical schemes based on similarities in morphology and chemistry have been replaced with schemes based on nucleotide sequences and ultrastructural features.

Fungi Reproduction

-most fungi reproduce sexually by sexual spores -asexually by either budding or asexual spores

water molds have spores with how many flagella?

2 flagella

chronic diarrhea, keratoconjunctivitis

2 problems that microspora cause

name the 2 types of Conidiospores

2 types a. Arthroconidia b. blastoconidia

Fission, budding, schizogony

3 methods of parasite asexual reproduction

Holdfasts, stipes, blades

3 structural parts of algae

how many known species of molds and yeasts does the divsion Ascomycota contain?

32,000 known species

systemic, subcutaneous, cutaneous, superficial, opportunistic

5 classifications of mycoses

Saprobes Fungi

An organism that acts as a decomposer by absorbing nutrients from dead organic matter.

the division of a cell's cytoplasm is called

Cytokinesis

Cytokinesis

Cytoplasmic division

Water Molds

Decompose dead animals in aquatic habitats and return nutrients to the environment; some plant pathogens of grapes, tobacco, and potatoes

silica cell walls (frustules) major component of phytoplankton; major source of world's oxygen.

Diatoms

Zygospore

Diploid fungal zygote wutg a thick wall

Mitosis

Diploid nuclei producing diploid nuclei

Meiosis

Diploid nuclei producing haploid nuclei

Deuteromycetes

Division of Fungi in which most are terrestrial Saprobes, or pathogens of plants or other fungi

Basidiomycota

Division of Fungi that reproduce sexually by forming Basidiospores attache to ends of club-shaped Basidia, which are part of the fruiting body, the Basidiocarp (cap or umbrella-like top)

Basidiomycota

Division of Fungi; most are Saprobes and are important decomposers of Cellulose in Lignin in dead plants; examples are edible and poisonous mushrooms, puffballs, etc., some plant pathogens causing rusts and smuts, and a human pathogen, Cryptococcus neoformans

Ascomycota

Division of fungi that reproduce sexually by forming Ascospores within sacs (Asci); Many are Saprobes; most food spoilage is due to fungi in this group

Less

Do fungi need more or less moisture to grow than bactera?

ascomycetes also include plant pathogens such as what agents?

Dutch elm disease

what ameobozoa causes fatal dystentry?

Entamoeba

Haustoria

In parasitic fungi, a nutrient-absorbing hyphal tip that penetrates the tissues of the host but remains outside the host cell membranes.

Visceral L.

Kalazar; results in liver, spleen, bone marrow (with severe anemia), and lymph node infection which is usually fatal if untreated, unlike other two forms

Slime Molds

Lack cell walls and are phagocytic in their nutrition.

Diplomonadida

Lack mitochondria, Golgi bodies, and peroximones.

what do Amoebozoas have? what do they lack?

Lobe shaped pseudopodia NO shells

Algae

Many Multicellular ______ reproduce sexually with Alternation of Generations of Haploid and Diploid individuals

______ is nuclear division of diploid cells that results in four haploid daughter nuclei. sexual reproduction

Meiosis

Protozoans require what kind of environments?

Moist

Meiosis

Nuclear division that results in four nuclei, each half the ploidy of the original

Trypanosoma cruzi

Pathogenic Protozoan Flagellate; causes Chagas' Disease; primarily seen in Central and South America (some outbreaks in California and Texas); spread by bite wound contamination from feces of infected Triatomid Bug (Kissing Bug); Armadillos and Opossums are the primary reservoirs; Parasite-induced heart disease is the major cause of death in Latin America

Leishmania sp.

Pathogenic Protozoan Flagellate; causes Leishmaniasis (L.) in Central and South America, Central and South Asia, Africa, Europe, and the Middle East; Severity depends on the species

Giardia intestinalis

Pathogenic Protozoan Flagellate; parasite in the G.I. tracts of humans and animals (domestic and wild) worldwide, also in water, soil, and contaminated objects, since spread by fecal contamination, including from infected dogs

Trichomonas vaginalis

Pathogenic Protozoan Flagellate; worldwide, causes MOST COMMON PROTOZOAN DISEASE IN DEVELOPED COUNTRIES-VAGINITIS in females; transmitted sexually

__________contain brown pigments called xanthopylls and a polysaccharide called laminarin +oil cell walls are composed of cellulose and alginic acid; also a thickening agent

Phaeophyta-brown algae

Four phases of Mitosis

Prophase, metaphase, anaphase, telophase

eukaryotic; unicellular organisms lack a cell wall. Most are chemoheterotrophes. name this organism

Protozoa

Amoebae

Protozoa that move and feed with pseudopodia. -Cercozoa: threadlike pseudopodia and calcium carbonate shells. -Radiolaria: threadlike pseudopodia and silica shells -Amoebozoa: lobed shaped pseudopodia. includes free living amoebae, parasitic amoebae, and slime molds.

Rhodophyta

Red Algae contain the pigment phycoerythrin, the storage molecule floridean starch, and cell walls of agar or carrageenan, substances used as thickening agents.

Rhodophyta

Red Algea

Entamoeba histolytica

Symptoms: depend on the strain and health of the person, ranges from asymptomatic to Amebic Dysentery- results in colitis, appendicitis, and ulceration of intestinal mucosa; resulting in severe diarrhea with mucous and blood

Giardia intestinalis

Symptoms: disease can vary from asymptomatic to severe with watery diarrhea, abdominal pain, bloating, vomiting, and low fever; occasionally tissue damage and major fluid loss

Trichomonas vaginalis

Symptoms: in females: pus-filled, odorous discharge, vaginal and cervical lesions, pain with urination and intercourse and found in the vulva and vagina; in males: usually asymptomatic and found in the prostate and urethra

Plasmodium sp.

Symptoms: intense chills, fever, sweating with headache and diarrhea; may be chronic disease with periodic relapses; severity depends on species, mild to fatal; spread by bite of infected mosquito

Balantidium coli

Symptoms: may cause diarrhea, abdominal pain and weight loss with intestinal lesions; spread by fecal contamination of water and food

Cryptosporidium parvum

Symptoms: may cause severe diarrhea, abdominal cramping, muscle pain, headache, and weight loss

Trypanosoma brucei

Symptoms: untreated parasite invades the CNS, resulting in headache, extreme drowsiness, neurological abnormalities, coma, and death

Trypanosoma cruzi

Symptoms: untreated results in myocarditis and eventually Congestive Heart Failure due to parasite accumulating in the heart muscle

Zygomycota, Ascomycota, Basidiomycota, and Deuteromycetes

The Four Divisions of Fungi; equivalent to Phyla in other Kingdoms, and based on type of Sexual spore produced

Which of the following statements accurately describes prophase?

The cell constructs microtubules to form a spindle.

Molds (Filamentous Fungi)

Their asexual reproduction includes the production of lightweight spores that differ in their mode of development; Sporangiospores, Chlamydospores, and Conidiospores

How Water Molds differ from Fungi

They have tubular Cristae in their Mitochondria, their Cell Walls are made of Cellulose instead of Chitin, their spores have 2 Flagella-one whip-like and one hairy, and they have true diploid thalli

Water molds differ from true fungi in what way?

They have tubular cristae in their mitochondria

Fruticose, Crustose, and Foliose

Three basic shapes of Lichens

what is a well-known opportunistic pathogenic parabasalid causes severe inflammation of the human vagina?

Trichomonas

euglenoids contain choroplasts that contain light absorbing pigments T or F?

True

Microsporidia fungi

Unicellular parasites of animals and protists that molecular comparisons suggest may be most closely related to zygomycete fungi.

Euglenids

Unicellular/ flagellated/ store food as paramylon/lack cell walls/ have eyespots used in postive phototaxis. -They exhibit characteristics of both animals and plants therefore they are a taxonomic problem.

Tuber sp.

Useful member of the Ascomycota division of fungi that is the Mycorrhizae of oak and beech tree roots; an edible delicacy (Truffles)

Penicillium sp.

Useful member of the Ascomycota division of fungi that is the source of a very important antibiotic discovered by Fleming

Saccharomyces sp.

Useful member of the Ascomycota division of fungi that produces ethanol and CO2 via Alcohol Fermentation

this crop pathogen devastated the potato crop in Ireland during the mid-19th century, causing a famine that killed over 1 million people. What was this?

Water Mold called Phytophthora infestans

aerobic

What are most Fungi in terms of oxygen?

Are Algae are Eukaryotes? Photosynthetic?

YES. Algea are eukaryotic and photosynthetic organisms

name the 4 classes of Fungi

Zygomycota Ascomycota Basidiomycota Deuteromycetes

Cytokinesis

a cells cytoplasm divides

what is a pellicle?

a thin multilayered sheath that underlies the cell membrane.

The motile feeding stage of a protozoan us called

a trophozoite

Septate or aseptate

a way of describing hyphae depending on the presense of crosswalls.

Lichens

abundant throughout the world, particularly in pristine habitats (do not grow in polluted environments); grow on soil, rocks, leaves, tree bark, othe Lichens, and even on the backs of tortoises; almost every habitat

Plasmodial Slime Molds

acellular and composed of multinucleate cytoplasm.

The asci that occurs in the fruiting bodies are called

acsocarps

Dioecious

adult helminths where male reproductive organs are in one individual and female reproductive organs are in another

Most fungi are aerobic or anerobic?

aerobic

Chemoheterotrophs

all fungi are BLANK; require organic compounds for energy and carbon

Yeasts

bud in a manner similar to prokaryotic budding; form pseudohyphae (series of buds that remain attached to one another and to parent cell forming short chain, as in Candida albicans

How do fungi reproduce?

budding via asexual spores

Nosema sp. and Microsporidium

can cause disease in immunocompromised people; example of a fungus from the Zygomycota division of fungi

dimorphic

can take either form of fungi (hyphae or yeast) depending upon growth conditions, such as temperature.They have either type of thallus depending on environmental conditions.

chrysophytes of Golden Algae contain more orange-colored _______ than chlorophyll, which accounts for their golden coloring

carotene

Homologous Chromosomes

carry similar genes

Trichinellosis

caused by nematode, causes heartworm primarily in dogs and cats, can infest humans, comes from mosquito bites

Aspergillus

causes aspergillosis, opportunistic mycoses, occurs in people with debilitating lung diseases or cancer and have inhaled the spores,

what do alveolates have?

cavities called alveoli

what are Fungi?

chemoheterotrophic eukaryotes with cell walls

Fungi

chemoheterotrophic eukaryotes with cell walls usually composed of chitin. Most are benefical but some produces mycoses (fungal disease)

what are the cell walls of fungi composed of?

chitin

what do cilaites of Alveolates have?

cilia and 2 nuclei

Multiple nuclear divisions without cytoplasmic divisions result in cells called

coenocytes

Fruticose

erect or hanging cylinders

what is a group of euglenozoa called?

euglenoids

African trypanosomiasis

euglenozoa, African sleeping disease, transmitted by the bite of tsetse fly

Leishmaniasis

euglenozoa, causes lesions either on the skin or on the organs depending on the type, caused by a bite from a female sandfly

Chagas' disease

euglenozoa, known as American trypanosomiasis, protozoan disease of the cardiovascular system, transmitted by the "kissing bug" (reduviid bug-arthropod)

Kinetoplastid

euglenozoan with a single, large, apical mitochondiron that contains a kinetoplastm which is a region of DNA.

Archaezoa

eukaryotes that lack mitochondria, but have mitosomes

Protozoa

eukaryotic, unicellular organisms that lack cell walls. Most of them are chemoheterotrophs.

Gamete

every algal cell becomes a ___________ (which is a unique characteristic of Algae) which fuses with another to form a zygote

Trophozoite stage

feeding and growing stage of protozoa, feeds upon bacteria and small particulate nutrients

yeasts get energy from

fermentation

Insect Vectors

fleas, lice, bloodsucking flies including mosquitoes and kissing bugs

Definitive host

host that harbors the sexually reproducing stage

reproduce asexually only, by binary fission or schizogony; few are sexual

how do protozoa reproduce?

Trichophyton sp.

human pathogen from the Deuteromycetes division of fungi that causes "ringworm"

Gymnodinium sp. and Gonyaulax sp.

humans can be poisoned by eating shellfish from infested areas because the shellfish eat the Dinoflagellates and concentrate the toxins

branching, threadlike LONG FILAMENTS tubes that make up the bodies of multicellular fungi

hyphae

long, branched tubular filaments that make up body (thallus) of molds or fleshy fungi

hyphae

Coencytic hyphae

hyphae contain no septa and appear as long, continuous cells with many nuclei

Septate

hyphae divided into uninucleate cells of cross walls (most hyphae are)

Aseptate

hyphae that have no cross-walls and are multinucleate

Septate hyphae

hyphae with cross-walls which divide molds into distinct uninucleate cell-like units

Sporozite

infective stage of plasmodium

how do Sporangiospores form?

inside a sac called a sporangium

Human

intermediate host of malaria

Mycelium

intertwined mass of Hyphae; typical of most mold growth

No

is there peptidoglycan in fungi cell walls?

Large Algea

multicellular thalli with stemlike stipes, leaflike blades, and holdfasts that attach them to substrates.

Coenocytic

multinucleate (term used in the Aseptate definition)

Coenocytes

multinucleate cells resulting from repeated mitoses but postponed or no cytokinesis.

Plasmodial slime molds are composed of _________ ______ of _______

multinucleate filaments of cytoplasm.

Schizogony

multiple fission; nucleus undergoes multiple division before the cell divides

schizogony

multiple mitoses, the cell forms many nuclei and the cytoplasm separates. Multinucleate schizont

hyphae of a mold that intertwines into a tangled mass

mycelium

what is study of fungi?

mycology

fungal diseases are called

mycoses

Cellular slime molds are composed of what?

myxamoebae (amobea like structures)

Conidiospores (or Conidia)

naked spore (not within sac) that form at the ends or sides of Hyphae as fragments, buds, or in chains at the end of a stalk

Phaeophyta (brown)

name the brown algae

what are lichens used for ?

nitrogen, food for animals/ humans, dyes, clothing, perfume, medicine and to monitor air quality

Yeast

nonfilamentous, unicellular, spherical or oval, frequently found as white powdery coating on fruits and leaves, facultative anaerobic growth, survive in various elements

Thallus

noreproductive body of a filamentous fungus (mold) or yeast (unicellular fungus). Mold thalli are composed of tubular filaments called hyphae.

what happens after the basidiomycetes decompose cellulose and lignin?

nutrients are returned to the soil

Saprobes Haustoria Aerobic(with oxygen) facultative (survive in varitey of hostile conditions) anaerobic (no oxygen) Low Moisture acidic environements metabolize complex carbs these all represent nutrition of what?

nutrition of fungi

Nosema sp.

obligate intracellular parasite on insects, such as silkworms, honeybees, and grasshoppers; example of a fungus from the Zygomycota division of fungi

Apicomplexa

obligate intracellular parasites, not motile in mature form, presence of a complex of special organelles at the tips of their cells

Hermaphroditic

one animal has both male and female reproductive organs

Giardia lamblia

parasitic archaezoa, causes Giardiasis, found in the small intestine of humans and other mammals, excreted in the feces as a cyst

Lichens

partnerships between Fungi and photosynthetic microbes (Green Algae or Cyanobacteria)

Candida albicans

pathogen that is the most common cause of yeast infections

Vectors

pathogenic microorganisms carried by arthropods

Encystment

production of a protective capsule called a cyst

Which of the following sequences reflects the correct order of events in mitosis?

prophase, metaphase, anaphase, telophase

Which of the following features characterizes diatoms?

protective plates of cellulose in their cells

Taxonomists continue to revise and refine the classification of ______ based on 18S rRNA nucleotide sequencing and features made visible by electron microscopy.

protozoa

chemoheterotrophic: obtaining nutrients by phagocytizing bacteria, decaying organic matter, other protozoa, or the tissues of a host; a few protozoa absorb nutrients from the surrounding water.

protozoa nutrition

study of protozoa is called

protozoology

Parasitic helminths

signigicant to microbiologists in part because their infective stages are usually microscopic.

What do Parabasalas have?

single nucleus and a parabasal body (golgi-like)

the thalli (bodies) of yeasts are ________, ________ and are composed of a ________ ________

small, globular, single cell

bits of lichen dispersed by small animals, wind or rain

soredia

Neurospora sp.

species of fungi that was used by Beadle and Tatum to show that one gene codes for one enzyme

Which of the following is common to mitosis and meiosis?

spindle

Asexual spores

spores formed by the hyphae of one organism; genetically identical to parent

Sexual spores

spores result from the fusion of nuclei from two opposite mating strains of the same species of fungus; genetic similarities to both parents

how does the fungus of a lichen reproduce?

spores that capture algae

Leishmania sp.

spread by bite of Sand Flies; reservoirs are rodents and dogs

A motile trophozoite

the feeding stage of a typical protozoan

Chlamydospores

thick-walled spores that form within Hyphae

Dimorphic Fungi

those producing both yeastlike and moldlike Thalli

Sporangiospores

those that form within a sac (Sporangium) at the end of a stalk attached to a Hyphae

All free-living aquatic and pathogenic protozoa exist as a motile feeding stage called a ______________

trophozoite

motile feeding stage of a protozoan

trophozoite

what do Water molds have in their mitochondria?

tubular cristae

Protozoan conjugation

two cells fuse, and a haploid nucleus from each cell migrates to the other cell, this haploid micronucleus fuses with the haploid micronucleus within the cell, parent cells separate each now a fertilized cell, later divide into daughter cells

Platyhelminths (flatworms), Nematoda (roundworms)

two major categories of parasitic helminthes

Sporangiospore

type of asexual spore, formed within a sac, produced by Rhizopus

Conidiospore

type of asexual spore, unicellular or multicellular spore NOT enclosed in a sac, produced in a chain at the end of a conidiophore, spores produced by aspergillus

Algea

typically reproduce by an alternation of generations in which a haploid thallus alternates with a diploid thallus.

Algae have 3 different types of morphology. name them

unicellular colonial multicellular

Algae

unicellular or filamentous, aquatic, need moisture, simple eurkaryotic photoautotrophs, lack tissues of plants, produce sexually or asexually

Protozoa

unicellular, eukaryotic chemoheterotrophic, usually require a host to feed off of

Mitosomes

unique organelle in archaezoa which resemble mitochondria

Cryptococcus neoformans

usually only infect immunocompromised patients, AIDS patients, inhaled fungus in bird droppings, effects central nervous system, causes meningitis and death at high rates


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