Which alga exhibits a haplo-diplontic life cycle?

Which of the following algae is most likely to be found in the deepest waters of the ocean?

Which of the following algae is symbiotic and nitrogen-fixing?

The plant body of Thallophyta is ........

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.

Match Column $I$ with Column $II$ and choose the correct option:

Column $I$	Column $II$
$a.$ Shallowest depth	$(i)$ Green algae
$b.$ Intermediate depth	$(ii)$ Brown algae
$c.$ Greatest depth	$(iii)$ Red algae