Q: Which of the following equations best represents the process of photosynthesis in red algae?

$$6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2O + \text{light energy} \rightarrow C_6H_{12}O_6$ + 6\ \mathrm{O}_2$$

Question 1

Which of the following statements about 'protists' is correct based on current biological classification?

Accepted Answer

Protists are a paraphyletic group, not forming a single clade.

Question 2

Giant kelp and Sargassum are ecologically important because they:

Accepted Answer

Provide food and shelter to many marine organisms.

Question 3

Which of the following best describes red algae?

Accepted Answer

They are photosynthetic eukaryotes.

Question 4

A marine biologist is studying a kelp forest. Which of the following ecological roles does giant kelp most likely play in this environment?

Accepted Answer

Primary producer

Question 5

Which of the following is a common misconception about protists?

Accepted Answer

Protists are a monophyletic group.

Question 6

A student claims that all photosynthetic organisms are plants. Which of the following best refutes this claim?

Accepted Answer

Red algae, which are protists, are also photosynthetic.

Question 7

Which of the following equations best represents the process of photosynthesis in red algae?

Accepted Answer

$$6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2O + 	ext{light energy} ightarrow C_6H_{12}O_6$ + 6\ \mathrm{O}_2$$

Question 8

Which of the following best explains why 'protists' are not considered a single evolutionary lineage?

Accepted Answer

They include organisms that are more closely related to plants, animals, or fungi than to each other.

Question 9

A marine ecosystem is experiencing a decline in kelp populations. Which of the following is a likely consequence?

Accepted Answer

Decreased food and habitat availability for many marine species.

Question 10

Which of the following statements about Sargassum is correct?

Accepted Answer

It provides both food and shelter for marine organisms.

Question 11

A scientist is studying a photosynthetic protist found in deep ocean waters. Which pigment is most likely to be abundant in this organism, allowing it to absorb blue and green light efficiently?

Accepted Answer

Phycoerythrin

Question 12

Which of the following best describes the ecological role of red algae in marine environments?

Accepted Answer

They are primary producers that contribute to reef building.

Question 13

Which of the following is NOT a characteristic shared by all protists?

Accepted Answer

Ability to photosynthesize

Question 14

A student is asked to identify a protist under the microscope. Which of the following features would best confirm that the organism is a eukaryote?

Accepted Answer

Presence of a nucleus

Question 15

Which of the following scenarios best illustrates the importance of protists in human life?

Accepted Answer

Red algae are used as a source of agar in microbiology labs.

Question 16

Which of the following best explains why the term 'protist' is still used in biology, despite not representing a true clade?

Accepted Answer

It is a convenient way to refer to diverse eukaryotes that are not plants, animals, or fungi.

Question 17

A researcher is studying the energy flow in a marine ecosystem. Which formula would best represent the energy transfer from kelp to sea urchins?

Accepted Answer

$$	ext{Kelp} \xrightarrow{	ext{consumption}} 	ext{Sea urchins}$$

Question 18

Which of the following is a real-world application of red algae in biotechnology?

Accepted Answer

Extraction of agar for use as a growth medium in laboratories

Question 19

Which of the following best describes the relationship between Sargassum and marine biodiversity?

Accepted Answer

Sargassum increases marine biodiversity by providing habitat and food for various organisms.

Question 20

Which of the following best explains why protists are important in aquatic food webs?

Accepted Answer

They serve as both primary producers and consumers, forming the base of many aquatic food chains.

BIO 1020 Quiz 2: Protists, Algae, and Marine Biology Concepts – Guided Study

Study Guide - Practice Questions

Study Guide - Flashcards