What is a coenobium?

Who is known as the father of modern phycology in India?

The main plant body in Thallophyta is .........

$A$ research student collects and observes some algae. The cells contain both chlorophyll $a, b, c$ and chlorophyll $d$,in addition to phycoerythrin. This alga belongs to:

In which of the following are the sex organs found to be exposed?

In the life cycle of which group are flagellated cells not formed?