Question 1

Which algae group has the largest multicellular forms?

Accepted Answer

A)  brown algae 
B)  diatoms 
C)  red algae 
D)  golden algae 
E)  green algae 
A)  brown algae 
B)  diatoms 
C)  red algae 
D)  golden algae 
E)  green algae A

Question 2

Euglena have chloroplasts and can perform phagocytosis.Euglena would be considered which of the following?

Accepted Answer

A)  detritovores 
B)  heterotrophs and detritovores 
C)  autotrophs and heterotrophs 
D)  autotrophs 
E)  heterotrophs 
A)  detritovores 
B)  heterotrophs and detritovores 
C)  autotrophs and heterotrophs 
D)  autotrophs 
E)  heterotrophs C

Question 3

Dictyostelium discoideum is an unusual organism,one that straddles the boundary between the unicellular and the multicellular.Its feeding phase consists of individual amoeba-like cells that move independently,feeding on bacteria by phagocytosis.When the food runs out,cells begin to aggregate into a multicelled structure that migrates toward light.The cells differentiate into a base,stalk,and spores; only the spores survive to colonize a new habitat.What is the advantage of forming spores?

Accepted Answer

A)  Spores can mate with other species. 
B)  Spores are smaller and can be transported to new habitats. 
C)  The spores are photosynthetic. 
D)  The spores will eat the other cells. 
E)  Spores have flagella and can swim to new habitats. 
A)  Spores can mate with other species. 
B)  Spores are smaller and can be transported to new habitats. 
C)  The spores are photosynthetic. 
D)  The spores will eat the other cells. 
E)  Spores have flagella and can swim to new habitats. B

Question 4

All protists are single-celled.

Accepted Answer

A) True 
 B)False

Question 5

The engulfment of food particles by a heterotrophic protist cell is

Accepted Answer

A)  chemotaxis. 
B)  phagocytosis. 
C)  pseudopodia. 
D)  organotaxis. 
E)  cytokinesis. 
A)  chemotaxis. 
B)  phagocytosis. 
C)  pseudopodia. 
D)  organotaxis. 
E)  cytokinesis.

Question 6

Slime molds may exist as either single amoeboid cells or large masses of cells that behave as one multicellular organism.

Accepted Answer

A) True 
 B)False

Question 7

The Irish potato famine in the mid-1840s was caused by a heterotrophic protist,Phytophthora infestans,which was successful in widespread infection of potato plants,largely because it was

Accepted Answer

A)  a fungus, which has filaments very similar to water and slime molds. 
B)  a protozoan, with flagella, and swimming to potato plants in wet seasons, engulfing and digesting the potato cells. 
C)  a diatom, with a silica shell allowing it to survive the soil conditions in which potatos grow as specialized roots. 
D)  a red algae, able to perform photosynthesis, allowing its cells to spread from the coast to potato farm fields. 
E)  a water mold, and its soft, fleshy filaments benefitted from several rainy seasons. 
A)  a fungus, which has filaments very similar to water and slime molds. 
B)  a protozoan, with flagella, and swimming to potato plants in wet seasons, engulfing and digesting the potato cells. 
C)  a diatom, with a silica shell allowing it to survive the soil conditions in which potatos grow as specialized roots. 
D)  a red algae, able to perform photosynthesis, allowing its cells to spread from the coast to potato farm fields. 
E)  a water mold, and its soft, fleshy filaments benefitted from several rainy seasons.

Question 8

Protists can be autotrophs.

Accepted Answer

A) True 
 B)False

Question 9

African sleeping sickness is caused by Trypanosoma brucei,a unicellular flagellated protist that infects red blood cells after being injected into the bloodstream.Trypanosoma brucei is which of the following?

Accepted Answer

A)  an apicomplexan 
B)  an alga 
C)  a diatom 
D)  a protozoan 
E)  a slime mold 
A)  an apicomplexan 
B)  an alga 
C)  a diatom 
D)  a protozoan 
E)  a slime mold

Question 10

Golden algae,diatoms,and brown algae contain yellowish pigments.

Accepted Answer

A) True 
 B)False

Question 11

The microscopic food that supports the ocean's vast food webs is

Accepted Answer

A)  golden and brown algae. 
B)  All of the answer options are correct. 
C)  green algae. 
D)  euglenoids. 
E)  dinoflagellates. 
A)  golden and brown algae. 
B)  All of the answer options are correct. 
C)  green algae. 
D)  euglenoids. 
E)  dinoflagellates.

Question 12

Chlamydomonas is multicellular,produces motile haploid sperm,and is photosynthetic.Chlamydomonas is which of the following?

Accepted Answer

A)  an apicomplexan 
B)  a slime mold 
C)  a green alga 
D)  a protozoan 
E)  a diatom 
A)  an apicomplexan 
B)  a slime mold 
C)  a green alga 
D)  a protozoan 
E)  a diatom

Question 13

When Abrams and Townsend investigated the natural selection of copepods that avoid predation of bioluminescent dinoflagellates,which of the following best states the hypothesis they were testing?

Accepted Answer

A)  The bioluminescent dinoflagellates produce enough light that they can also photosynthesize at night, harming the copepods. 
B)  Copepods that avoid bioluminescent dinoflagellates have a smaller chance of being eaten by predators than do copepods that remain near and feed on the bioluminescent dinoflagellates. 
C)  The light emitted by bioluminescent dinoflagellates is of sufficient wavelength and energy to be dangerous to feeding copepods. 
D)  None of the answer choices are correct. 
E)  Bioluminescent flagellates benefit from selection of flashing, because it startles the copepods. 
A)  The bioluminescent dinoflagellates produce enough light that they can also photosynthesize at night, harming the copepods. 
B)  Copepods that avoid bioluminescent dinoflagellates have a smaller chance of being eaten by predators than do copepods that remain near and feed on the bioluminescent dinoflagellates. 
C)  The light emitted by bioluminescent dinoflagellates is of sufficient wavelength and energy to be dangerous to feeding copepods. 
D)  None of the answer choices are correct. 
E)  Bioluminescent flagellates benefit from selection of flashing, because it startles the copepods.

Question 14

Some protozoa have cell structures that are formed as temporary extensions of the cell membrane,allowing the cell to detect and respond to their environment,and to catch and engulf food.These extensions are called

Accepted Answer

A)  pseudopodia. 
B)  flagella. 
C)  cilia. 
D)  spikes. 
E)  antennae. 
A)  pseudopodia. 
B)  flagella. 
C)  cilia. 
D)  spikes. 
E)  antennae.

Question 15

Based on the theory of endosymbiosis,which of the following would you expect to find in a chloroplast?

Accepted Answer

A)  a mitochondrion 
B)  DNA 
C)  silica 
D)  cellulose 
E)  a nucleus 
A)  a mitochondrion 
B)  DNA 
C)  silica 
D)  cellulose 
E)  a nucleus

Question 16

Euglena and dinoflagellates have chloroplasts and flagella.This means they are which of the following?

Accepted Answer

A)  multicellular and mobile 
B)  photosynthetic 
C)  mobile 
D)  multicellular 
E)  photosynthetic and mobile 
A)  multicellular and mobile 
B)  photosynthetic 
C)  mobile 
D)  multicellular 
E)  photosynthetic and mobile

Question 17

A protective layer made of rigid or elastic protein strips surrounding the cell membrane of euglenoids is a

Accepted Answer

A)  cell wall. 
B)  pseudopodium. 
C)  gullet. 
D)  flagellum. 
E)  pellicle. 
A)  cell wall. 
B)  pseudopodium. 
C)  gullet. 
D)  flagellum. 
E)  pellicle.

Question 18

While on a field trip near the ocean coastline,you visit a company that harvests jellylike substance from protists.This substance can be used as food,or in biology lab dishes for culturing organisms that have red-blue pigments,and store starch like plants.The company extracts the substance from multicellular plant-like organisms.You are observing the economic values of

Accepted Answer

A)  agar and carrageenan, which are both economic commodities from protists. 
B)  red ooze from decaying protist cells. 
C)  gelatin, which makes up the cytosol of most cells. 
D)  carrageenan, a polysaccharide. 
E)  agar, a polysaccharide. 
A)  agar and carrageenan, which are both economic commodities from protists. 
B)  red ooze from decaying protist cells. 
C)  gelatin, which makes up the cytosol of most cells. 
D)  carrageenan, a polysaccharide. 
E)  agar, a polysaccharide.

Question 19

A contractile vacuole is not

Accepted Answer

A)  used to pump water out of a cell. 
B)  used to pump water into a cell. 
C)  None of the answer choices are correct. 
D)  found in Paramecium. 
E)  an organelle. 
A)  used to pump water out of a cell. 
B)  used to pump water into a cell. 
C)  None of the answer choices are correct. 
D)  found in Paramecium. 
E)  an organelle.

Question 20

Trichonympha is a unicellular flagellated protist that lives within termites and allows the termite to be able to "digest" wood.Trichonympha is which of the following?

Accepted Answer

A)  an alga 
B)  an apicomplexan 
C)  a slime mold 
D)  a protozoan 
E)  a diatom 
A)  an alga 
B)  an apicomplexan 
C)  a slime mold 
D)  a protozoan 
E)  a diatom

Exam 18: Protists

Which algae group has the largest multicellular forms?

Euglena have chloroplasts and can perform phagocytosis.Euglena would be considered which of the following?

All protists are single-celled.

The engulfment of food particles by a heterotrophic protist cell is

Slime molds may exist as either single amoeboid cells or large masses of cells that behave as one multicellular organism.

The Irish potato famine in the mid-1840s was caused by a heterotrophic protist,Phytophthora infestans,which was successful in widespread infection of potato plants,largely because it was

Protists can be autotrophs.

African sleeping sickness is caused by Trypanosoma brucei,a unicellular flagellated protist that infects red blood cells after being injected into the bloodstream.Trypanosoma brucei is which of the following?

Golden algae,diatoms,and brown algae contain yellowish pigments.

The microscopic food that supports the ocean's vast food webs is

Chlamydomonas is multicellular,produces motile haploid sperm,and is photosynthetic.Chlamydomonas is which of the following?

When Abrams and Townsend investigated the natural selection of copepods that avoid predation of bioluminescent dinoflagellates,which of the following best states the hypothesis they were testing?

Some protozoa have cell structures that are formed as temporary extensions of the cell membrane,allowing the cell to detect and respond to their environment,and to catch and engulf food.These extensions are called

Based on the theory of endosymbiosis,which of the following would you expect to find in a chloroplast?

Euglena and dinoflagellates have chloroplasts and flagella.This means they are which of the following?

A protective layer made of rigid or elastic protein strips surrounding the cell membrane of euglenoids is a

A contractile vacuole is not

Trichonympha is a unicellular flagellated protist that lives within termites and allows the termite to be able to "digest" wood.Trichonympha is which of the following?

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