Mention the major classes of algae.

In which of the following are Chlorophyll-$a$,Chlorophyll-$d$,and Phycoerythrin found?

The Indian species of $Spirogyra$ in which Prof. Iyengar discovered direct lateral conjugation is:

Which of the following exhibits characteristics similar to algae?

Which of the following statements are applicable to brown algae?
$(I)$ They contain pigments like chlorophyll $a$,chlorophyll $c$,carotenoids,and xanthophylls.
$(II)$ They vary in color from olive green to various shades of brown.
$(III)$ Food is stored as complex carbohydrates,in the form of laminarin or mannitol.
$(IV)$ The cell wall is composed of cellulose and algin.
$(V)$ The cell wall is covered on the outside by a gelatinous coating of algin.

$Irish$ moss is a member of ........