In the life cycle of Polysiphonia, a complex Rhodophycean alga, what unique characteristic distinguishes it from most other algal groups?

Agar-agar is obtained from

Carrageen is mainly produced by members of

Consider the following statements

I. Agar, one of the commercial products obtained from Gelidium and Gracilaria are used to grow microbes and in preparations of ice-creams and jellies

II. Chlorella and Spirogyra are used in sewage disposal ponds

III. Some species of marine algae like Porphyra,Laminaria and Sargassum are used as food

Which of the statements given above are correct?

The stored food material in Rhodophyceae is:

Reserve food in Rhodophyceae is?

Which of the given is a red alga?

Identify the mismatched pair relating a vitamin to its deficiency disease.

The cell wall of Rhodophyceae is composed of:

Consider the following statements

I. In red algae vegetative reproduction takes place by fragmentation

II. In red algae the food is stored as floridean starch, which is very similar to amylopectin and glycogen is structure

III. Cell wall of red algae consists of chitin

Which of the statements given above are correct?

Chlorophyll-a, chlorophyll-d and phycoerythrin are characteristics of class