Which of the following pairs consists of unicellular algae?

Pyrenoids are typically found in algae. $A$ pyrenoid is made up of:

In Thallophyta,sexual reproduction occurs by:

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.

Lateral conjugation involves

Which group of plants lacks differentiated organs such as roots,stems,and leaves?