Question

question 6
1 point
which of the statements is true regarding protists?
a they may be photosynthetic.
b they are usually aerobic, though some are not.
c they are a monophyletic group of organisms.
d they may have cell walls.

Explanation:

• Option A: Many protists like algae are photosynthetic.
• Option B: Most protists are aerobic, but some (e.g., some parasitic protists) can be anaerobic.
• Option C: Protists are a polyphyletic group (not monophyletic as they do not share a single common ancestor exclusive to them).
• Option D: Some protists (e.g., algae have cell - walls made of cellulose, some slime molds have cell - like structures in their life cycle with cell - wall - like components).

Answer:

A. They may be photosynthetic, B. They are usually aerobic, though some are not, D. They may have cell walls.