Ulothrix is

$A$ student observes an alga containing chlorophyll $a$,$d$,and phycoerythrin. To which group should this alga belong?

$A$ research student collected a certain alga and found that its cells contained both chlorophyll $a$ and chlorophyll $d$,as well as phycoerythrin. The alga belongs to:

Which of the following lacks both roots and stomata?

What does the cell wall of algae consist of?

Stomata are not found in