In which of the following algal groups is the whole organism (not just the reproductive cells) motile (capable of moving)?

Question

Quizplus · Accepted Answer

Diatoms are unique among the options given because they can exhibit motility. Although not all diatoms are motile, some can move through a gliding mechanism facilitated by the secretion of mucilaginous substances, allowing them to adjust their position in the water column. This capability is not characteristic of the entire organisms in the other options listed, which are primarily sessile or non-motile at the organismal level.

In Which of the Following Algal Groups Is the Whole