Identify the alga shown in the figure.

Who is regarded as the "Father of Indian Phycology"?

Consider the following statements regarding reproduction in class-$Chlorophyceae$.
$I.$ Asexual reproduction is mainly by flagellated zoospores produced in zoosporangia.
$II.$ The sexual reproduction shows considerable variation in the type and formation of sex cells and it may be isogamous,anisogamous and oogamous.
Which of the statements given above are correct?

The matrix around a $Nostoc$ colony is:

In which of the following algal classes are starch and oil present as food storage materials?

Polyuronic acids and polysulphate esters are characteristic of the cell wall of ........