Question 1

Which of the following statements best explains why 'Kingdom Protista' is not considered a monophyletic group?

Accepted Answer

It includes most, but not all, descendants of a common ancestor.

Question 2

Which domain contains organisms with membrane-bound organelles such as mitochondria and a nucleus?

Accepted Answer

Eukarya

Question 3

A scientist discovers a unicellular organism with pseudopodia and no cell wall. Which major eukaryotic clade is this organism most likely to belong to?

Accepted Answer

Amoebozoans

Question 4

Which of the following protists is responsible for causing malaria in humans?

Accepted Answer

Plasmodium

Question 5

Red tides, which can be harmful to marine life and humans, are primarily caused by blooms of which group of protists?

Accepted Answer

Dinoflagellates

Question 6

Which of the following is a shared derived character of all eukaryotes?

Accepted Answer

Membrane-bound organelles

Question 7

Which process is responsible for the origin of chloroplasts in eukaryotic cells?

Accepted Answer

Primary endosymbiosis

Question 8

A protist is observed to have two types of nuclei and moves using cilia. To which group does it most likely belong?

Accepted Answer

Ciliates

Question 9

Which of the following equations best represents the photosynthetic process carried out by many protists?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 10

Which protist group is most closely related to land plants?

Accepted Answer

Green algae

Question 11

Which of the following is an example of convergent evolution among protists?

Accepted Answer

Multiple independent origins of multicellularity

Question 12

A termite relies on protists in its gut to digest cellulose. This is an example of which ecological role of protists?

Accepted Answer

Mutualist

Question 13

Which of the following protists is a flagellated parasite that causes African Sleeping Sickness?

Accepted Answer

Trypanosoma

Question 14

Which major eukaryotic clade includes both fungi and animals?

Accepted Answer

Unikonta

Question 15

Which of the following best describes the role of diatoms in marine ecosystems?

Accepted Answer

They are major photosynthetic producers.

Question 16

Which of the following protists is commonly found in freshwater and is known for its mixotrophic lifestyle?

Accepted Answer

Euglena

Question 17

Which of the following is a correct statement about the evolutionary history of multicellularity in eukaryotes?

Accepted Answer

Multicellularity evolved independently multiple times in different eukaryotic lineages.

Question 18

Which of the following protists is a common cause of waterborne gastrointestinal illness and is often filtered out of drinking water?

Accepted Answer

Giardia

Question 19

Which of the following best describes the function of pseudopodia in amoebozoans?

Accepted Answer

Locomotion and feeding

Question 20

Which of the following equations represents the process of cellular respiration, which is the reverse of photosynthesis?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O$$

Protists and the Diversity of Eukaryotes

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