Question 1

Which of the following features is found in eukaryotic cells but NOT in prokaryotic cells?

Accepted Answer

Cytoskeleton

Question 2

Protists are considered a 'taxonomic grab bag' because:

Accepted Answer

They include distantly related organisms grouped together for convenience

Question 3

Which statement best describes the nutritional strategies of protists?

Accepted Answer

Protists can be autotrophs, heterotrophs, or mixotrophs

Question 4

A scientist discovers a unicellular organism with a nucleus, contractile vacuole, and flagella. Which group does this organism most likely belong to?

Accepted Answer

Excavata

Question 5

Which of the following is a major ecological role of diatoms?

Accepted Answer

Forming the base of aquatic food webs as phytoplankton

Question 6

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

Accepted Answer

Dinoflagellates

Question 7

Which protist group is most closely related to land plants?

Accepted Answer

Green algae

Question 8

A protist that can switch between photosynthesis and consuming other organisms is called a:

Accepted Answer

Mixotroph

Question 9

Which of the following is TRUE about the group 'SAR'?

Accepted Answer

It is a monophyletic group defined by DNA similarities

Question 10

Which protist is responsible for causing malaria in humans?

Accepted Answer

Plasmodium

Question 11

Which of the following best explains why protists are important to ecosystems?

Accepted Answer

They form the base of many aquatic food webs and contribute to nutrient cycling

Question 12

Which protist group includes organisms with lobe- or tube-shaped pseudopodia?

Accepted Answer

Amoebozoans

Question 13

Which of the following is a real-world use of red algae by humans?

Accepted Answer

Extraction of agar for culture plates

Question 14

A colony of protists in which some cells specialize in feeding while others reproduce is an example of:

Accepted Answer

Division of labor

Question 15

Which equation best represents the process of photosynthesis in autotrophic protists?

Accepted Answer

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

Question 16

Which protist group is characterized by having two flagella and can be autotrophic, heterotrophic, or mixotrophic?

Accepted Answer

Dinoflagellates

Question 17

Which of the following statements about protists is FALSE?

Accepted Answer

Protists are a monophyletic group

Question 18

Which protist group includes the largest and most complex algae, commonly called 'seaweeds'?

Accepted Answer

Brown algae

Question 19

Which of the following is a characteristic of ciliates?

Accepted Answer

Presence of large macronuclei and small micronuclei

Question 20

A protist living in deep tropical coastal waters, appearing reddish due to phycoerythrin, is most likely:

Accepted Answer

A red alga

Protists: Diversity, Structure, and Ecological Importance

Guida di studio - Domande di pratica