Question 1

The organism shown in the image is a type of brown algae. Which structure anchors this seaweed to the substrate?

Accepted Answer

Holdfast

Question 2

Which pigment is primarily responsible for the brown coloration in brown algae such as the one shown in the image?

Accepted Answer

Fucoxanthin

Question 3

Brown algae exhibit alternation of generations. If the sporophyte and gametophyte look different, this is called:

Accepted Answer

Heteromorphic alternation

Question 4

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

Accepted Answer

Primary producer

Question 5

In brown algae, the structure labeled as the 'stipe' serves what function?

Accepted Answer

Acts as a stem-like support

Question 6

Which supergroup do brown algae belong to?

Accepted Answer

SAR

Question 7

A student observes a seaweed with a glasslike silica wall. Is this organism likely to be a brown algae?

Accepted Answer

No, because brown algae have cellulose walls

Question 8

Which of the following structures in brown algae is most analogous to leaves in land plants?

Accepted Answer

Blade

Question 9

If a brown algae sporophyte produces spores by meiosis, what is the ploidy of these spores?

Accepted Answer

Haploid

Question 10

Which equation best represents the alternation of generations in brown algae, where $$n is $$haploid and $$2n is $$diploid?

Accepted Answer

$$2n \rightarrow n \rightarrow 2n$$

Question 11

A marine biologist finds a seaweed with a stem-like structure and leaf-like blades. Which group is this organism most likely from?

Accepted Answer

Brown algae

Question 12

Which of the following is NOT a characteristic of brown algae?

Accepted Answer

Has a glasslike silica wall

Question 13

If a brown algae gametophyte produces gametes by mitosis, what is the ploidy of the gametes?

Accepted Answer

Haploid

Question 14

Which structure in brown algae is responsible for photosynthesis?

Accepted Answer

Blade

Question 15

Which of the following best describes the life cycle of brown algae?

Accepted Answer

Alternation of multicellular haploid and diploid stages

Protists: Diversity, Structure, and Life Cycles

Study Guide - Practice Questions