Question

Read the following statements about Rhodophyceae. Pick up the incorrect statements
(A) Agar-agar for are non-sulfated hydrocolloids
(B) Both red algae and blue-green algae lack flagella
(C) $Chl-a$, $d$, $r-phycoerythrin$ pigments are found in red algae
(D) Motile gametes of polysiphonic are called spermatia

• A. A & C
• B. A & B
• C. Only C
• D. Only B

Answer 1

The correct option is C Only C

A. Agar-agar- cell wall composed of a mixture of polysaccharides like cellulose, pectose, and algin(non- sulphated phycolloids. Phycocolloids are complex polysaccharides that store in the cell wall of algae, protect them from desiccation and prevent drying or freezing when exposed to air in low tide.

B. The red algae form a distinct group characterized by having eukaryotic cells without flagella and centrioles. The blue-green algae also lack flagella bit hormogonia of some species can move about by gliding along surfaces.

C. Red algae have chlorophyll a and d. They also have the pigments r-phycoerythrin ( a large amount which gives them their colour) and r - phycocyanin.

D. The non- motile male gametes of polysiphonic are called spermatia which are produced in spermatangia.

So, the incorrect statement is "Only C".