micro cht 5 (done)
In helminth life cycles, which host harbors the adult sexually reproductive phase of the parasite is called
definitive host
adulthood and mating of helminths occur in which host?
definitive host
all microbes that are unicellular, photosynthetic, and motile are classified as protozoans
false
order of fungi anatomy
filamentous fungi > Hyphae (septa) > mycelium(vegetative hyphae)
Which of these organisms has the best potential to survive in extreme environments?
fungi
which of these organisms has the best potential to survive in extreme environments?
fungi
In humans, helminths generally infect the ____.
gastrointestinal tract
As part of their reproductive cycle, helminths produce egg and sperm cells. both of these eukaryotic cell types have an outer surface composed of polysaccharides known as the ____.
glycocalyx
Larvae and eggs are developmental forms of ____.
helminths
Larval development of helminths occurs in which host?
intermediate host
microtuble
long hollow tubes that maintain cell shape and help transport items within the cell
which of the following does not pertain to helminths?
members of kingdom protista
which cytoskeletal fibers attach to and move chromosomes during mitosis?
microtubles
The Golgi apparatus ______
modifies proteins
helminth
multicellular animals
filamentous fungi
multicellular, cell walls of chitin, absorb nutrients, produce hypahe
Parasite
organism that lives in or on another organism for the purpose of acquiring nutrients
Saprobe
organism that obtains food from decaying organic matter
Which term most accurately describes a fungus growing on live human skin?
parasite
Chloroplasts are the site of what process in eukaryotic cells?
photosynthesis
select the statement that best describes the role of protozoan cysts
protozoan cysts are a survival form which allows them to survive adverse environmental conditions between hosts.
Choose the statement that best describes the role of mitochondria
prove cell with energy through cell repiration
intermediate filament
rope-like structures, 10nm in diameter, provide structural reinforcement
Fungi produce which structures for reproduction and multiplication? a. endospores b. cysts c. spores d. eggs
spores
A protozoan cyst differs from a helminth egg in that ____.
the cyst can germinate to form the organism but the egg must be fertilized
the two major parasitic groups of helminths include _____.
the flatworms. the roundworms
choose the statement that most accurately describes a typical helminth lifestyle.
the helminth reproduces sexually and spends most of its life in either a single animal host or a series of animal hosts.
Asexual spores
these are produced by the mitotic division of a SINGLE parent cell
sexual spores
these are produced by the union of genetic material from two different strains
actin filament
thin, 7nm in diameter, concentrated just inside the lasmic membrane
True or False vegetative hyphae produce spores
true
algae
unicellular or multicellular photosynthetic protists
yeast
unicellular, cell walls of chitin
protozoa
unicellular, heterotrophic protists
Yeasts are ___fungi, and molds are ____ fungi.
unicellular; filamentous
which groups represent eukaryotic organisms
-algae -protozoa -helminths -fungi
which groups represent eukaryotic organisms?
-algae -protozoa -helminths -fungi
Which structures are used by protozoans for motility?
-flagella -cilia -pseudopods
select all of the organisms that typically have cell walls
-fungi -algae -plants
select the choices that represent proper matches between organelle and its function in a eukaryotic cell.
-golgi apparatus-protein modification and production of condensing vesciles -smooth endoplasmic reticulum-storage of lipids and other nonprotein macromolecules
analyze the following statements, and select those that correctly apply to the characteristics of unicellular and multicellular organisms
-multicellular organisms evolved from colonial organisms when individual cells became specialized within the organism to perform a specific function -eukaryotic microbes are limited to protozoans, unicellular fungi, and the egg and/or larval stages of helminths -multicellular organisms, unlike colonial organisms, have their cells organized into specialized tissues.
Glycocalyx select all characteristics exhibited by the glycocalyx of eukaryotic cells.
-outermost surface of cell -composed of polysaccharide -means of adhering to other cells and surfaces -signal reception
select all the characteristics exhibited by BOTH bacterial and eukaryotic cytoplasmic membranes
-phospholipid bilayer -embedded proteins -selectively permeable barrier -transport systems
Select the activities of fungi which are considered detrimental from a human perspective.
-produce toxins such as aflatoxin -cause decomposition of fresh produce -cause disease in plants and animals contribute to allergies
when environmental conditions become unfavorable, many protozoa produce ___.
cysts
which of the following statements represent evidence supporting the endosymbiotic theory?
-the mitochondrion contains a circular chromosome that has bacterial DNA a sequences -mitochondria have two-layered membranes -the mitochondrion has ribosomes that are clearly prokaryotic -the mitochondrion is capable of independent divsion
Choose the characteristics that are exhibited by most protozoans
-unicellular -motile by means of flagella, cilia or pseudopodia -3um-300um size range -heterotrophic
Select all the characteristics of eukaryotic flagella that distinguish them from bacterial and arachaeal flagella
-whip back and forth -consist of a 9 +2 microtubule arrangement -200 nm in diameter
part
2
A mycelium is an intertwined mass of which type of fungal cells?
Hyphae
Amoeba utilize what structures for motility?
Pseudopods
Heterotrophic
acquisition of nutrients from organic materials (substrates)
it appears that the last common ancestor gave rise to which cell types?
bacteria, archaea, and eukaryotes
in contrast to bacterial cell walls that contain peptidoglycan, eukaryotic CELL WALLS are constructed of either ______
chitin or cellulose
