Microbiology Chapter 24
Select all that apply Select all correct descriptions of the ectoplasm of some protist cells. Multiple select question. It is another term for the cell membrane. It lies immediately under the plasmalemma. It imparts rigidity to the cell body. It has a fluid consistency. It is located outside the cell wall.
It lies immediately under the plasmalemma. It imparts rigidity to the cell body.
What is the traditional term for photosynthetic protists with a cell wall? Multiple choice question. archaea fungi algae protozoans
algae
Select all that apply Because many protists are unicellular, ______. Multiple select question. they are found in fewer environments than multicellular eukaryotes all of life's various functions must be performed within a single cell their forms of metabolism are much simpler than those of animals, plants, and fungi their structural complexity arises at the level of specialized organelles
all of life's various functions must be performed within a single cell their structural complexity arises at the level of specialized organelles
Most protists inhabit which type of environment? Multiple choice question. aquatic desert terrestrial (soil) organisms they parasitize
aquatic
Most protists inhabit which type of environment? Multiple choice question. aquatic terrestrial (soil) desert organisms they parasitize
aquatic
True or false: Because they are so diverse, protists share very few common features. True false question. True False
false
What is the function of the phagocytic vacuoles seen in some protists? Multiple choice question. osmotic balance food digestion energy metabolism immunity to infection
food digestion
most chemoorganotrophic protists
mitochondria
Most members of which protist supergroup possess a cytostome characterized by a suspension-feeding groove, and a posteriorly-directed flagellum that generates a feeding current? Multiple choice question. Chromalveolata Excavata Rhizaria Amoebozoa Archaeplastida
Excavata
True or false: All protists use mitochondria to generate usable energy. True false question. True False
False
Select the best definition of osmotrophy. Multiple choice question. simultaneous use of CO2 and reduced organic molecules as carbon sources acquisition of energy and carbon from sunlight and CO2, respectively absorption of soluble nutrients from the environment acquisition of solid nutrients by phagocytosis
absorption of soluble nutrients from the environment
Protists that ingest food by phagocytosis contain phagocytic vacuoles with a(n) ______ pH. Multiple choice question. alkaline neutral variable acidic
acidic
The best definition of photoautotrophy is ______. Multiple choice question. absorption of soluble nutrients from the environment simultaneous use of CO2 and reduced organic molecules as carbon sources acquisition of energy and carbon from sunlight and CO2, respectively acquisition of solid nutrients by phagocytosis
acquisition of energy and carbon from sunlight and CO2, respectively
What is the traditional term for photosynthetic protists with a cell wall? Multiple choice question. fungi protozoans algae archaea
algae
photosynthetic protists matches
chloroplasts
Select all types of environments that are normally inhabited by protists. Multiple select question. decaying organic matter freshwater soil areas lacking water
decaying organic matter freshwater soil
Select all types of environments that are normally inhabited by protists. Multiple select question. decaying organic matter soil areas lacking water freshwater
decaying organic matter soil freshwater
In some protists, the cytoplasm is divided into an outer, gelatinous region called the _______________, and an inner, fluid region called the ____________.
ectoplasm, endoplasm
Members of the Euglenozoa most commonly live in what environment? Multiple choice question. animal hosts salt water freshwater soil
freshwater
The acquisition of solid nutrients by phagocytosis is called ______________ nutrition.
holozoic
anaerobic chemoorganotrophic protists matches
hydrogenosomes
In some protists, the plasmalemma and a relatively rigid layer beneath it combine to form the _________________.
pellicle
Protists that take up solid nutrients from their environment contain sites of food digestion called _____________ vacuoles.
phagocytic
Protists that utilize holozoic nutrition acquire their nutrients by ______. Multiple choice question. osmotrophy phagocytosis mixotrophy photosynthesis
phagocytosis
Although it is identical to that of multicellular eukaryotes, the cell membrane of protists is known as the ______________.
plasmalemma
What is the traditional term for any chemoorganotrophic protist? Multiple choice question. fungus protozoan algae archaean
protozoan
Select all characteristics of the protist supergroup Excavata. Multiple select question. amoeboid movement relatively primitive group prokaryotic most have a cytostome posteriorly directed flagellum
relatively primitive group most have a cytostome posteriorly directed flagellum
Select all characteristics of the protist supergroup Excavata. Multiple select question. relatively primitive group most have a cytostome amoeboid movement posteriorly directed flagellum prokaryotic
relatively primitive group most have a cytostome posteriorly directed flagellum
Organisms that obtain nutrients from dead organic material by releasing degradative enzymes into their environment, and absorbing the soluble products, are known as ______. Multiple choice question. autotrophs organotrophs saprophytes mixotrophs
saprophytes
Most members of the Euglenozoa practice what type of nutrition? Multiple choice question. saprophytic photosynthetic holozoic
saprophytic
The best definition of mixotrophy is ______. Multiple choice question. acquisition of solid nutrients by phagocytosis simultaneous use of CO2 and reduced organic molecules as carbon sources acquisition of energy and carbon from sunlight and CO2, respectively absorption of soluble nutrients from the environment
simultaneous use of CO2 and reduced organic molecules as carbon sources
What is the major function of the pellicle of protist cells? Multiple choice question. osmoregulation structural support capturing prey reproduction
structural support
