$6\ \text{CO}_2 + 6\ \text{H}_2\text{O} \rightarrow C_6H_{12}O_6 + 6\ \text{O}_2$

$C_6H_{12}O_6 + 6\ \text{O}_2 \rightarrow 6\ \text{CO}_2 + 6\ \text{H}_2\text{O}$

Question 1

Which supergroup includes both animals and fungi, as well as protists with lobe- or tube-shaped pseudopodia?

Accepted Answer

Unikonta

Question 2

A protist with a spiral or crystalline rod inside its flagella is most likely a member of which group?

Accepted Answer

Euglenozoans

Question 3

Which of the following statements about alternation of generations is correct?

Accepted Answer

The diploid sporophyte produces haploid spores by meiosis.

Question 4

Which protist group is responsible for causing 'red tides' that can be toxic to marine life?

Accepted Answer

Dinoflagellates

Question 5

What is the main structural difference between oomycetes and fungi?

Accepted Answer

Oomycetes have cell walls made of cellulose, fungi have cell walls made of chitin.

Question 6

Which of the following is a key ecological role played by photosynthetic protists in aquatic environments?

Accepted Answer

Producing oxygen and forming the base of the food web

Question 7

A protist with two equal-sized nuclei, multiple flagella, and reduced mitochondria called mitosomes is most likely:

Accepted Answer

A diplomonad

Question 8

Which process best explains the origin of mitochondria and plastids in eukaryotic cells?

Accepted Answer

Endosymbiosis

Question 9

Which protist group includes organisms with a glass-like wall of silicon dioxide and plays a major role in global carbon cycling?

Accepted Answer

Diatoms

Question 10

A protist that forms a large, multinucleate 'supercell' called a plasmodium and produces fruiting bodies in unfavorable conditions is:

Accepted Answer

Plasmodial slime mold

Question 11

Which equation correctly represents the process of photosynthesis carried out by many protists?

Accepted Answer

$6\ 	ext{CO}_2 + 6\ 	ext{H}_2	ext{O} ightarrow C_6H_{12}O_6 + 6\ 	ext{O}_2$

Question 12

Which protist group is most likely to be found as a symbiont in coral polyps, providing nutrients through photosynthesis?

Accepted Answer

Dinoflagellates

Question 13

Which of the following is a plausible consequence of increasing sea surface temperatures for photosynthetic protists?

Accepted Answer

Decline in phytoplankton biomass and productivity

Question 14

Which protist group is characterized by threadlike pseudopodia and includes radiolarians and forams?

Accepted Answer

Rhizarians

Question 15

Which of the following best describes the reproductive strategy of ciliates?

Accepted Answer

Both asexual reproduction by binary fission and genetic variation through conjugation

Question 16

Which protist is a sexually transmitted parasite that infects the human reproductive tract and releases hydrogen gas as a by-product?

Accepted Answer

Trichomonas vaginalis

Question 17

Which equation represents the process of aerobic cellular respiration, which is NOT used by most diplomonads and parabasalids?

Accepted Answer

$C_6H_{12}O_6 + 6\ 	ext{O}_2 ightarrow 6\ 	ext{CO}_2 + 6\ 	ext{H}_2	ext{O}$

Question 18

Which protist group includes organisms with an accessory pigment called phycoerythrin, allowing them to live in deep water?

Accepted Answer

Red algae

Question 19

Which protist is known for causing sleeping sickness in humans and evading the immune system by changing its surface proteins?

Accepted Answer

Trypanosoma

Question 20

Which of the following is a real-world application of protists in food production?

Accepted Answer

Brown algae (Laminaria) is used as a thickener in processed foods due to algin in its cell wall.

Protists: Diversity, Evolution, and Ecological Roles

Study Guide - Practice Questions