Question

Batrachospermum is a
A. Red algae of sea
B. Brown algae
C. Blue algae
D. Red algae of freshwater

Answer 1

Hint:-Batrachospermum is a red algae of fresh water. This comes under the family of Bactrachospermaceae. This algae is found in slow running water or streams and on the banks of rivers and lakes. It is normally found in well aerated waters. The plants of this algae are blue-green, olive, violet or reddish in colour.

Complete step-by-step solution:-
Batrachospermum are found with colours like violet, reddish, olive green, blue-green the colour depends on the intensity of the light they are exposed to. The species which grow in deep fresh water are of colour violet or red whereas species which grow in shallow water are olive green in colour. The plants are mucilaginous. Moniliform or beaded in appearance to the naked eyes. It can reach the length of upto twenty centimetres and may easily be reached by slow running streams in the area of Dehradun especially in the winter season. It has thallus, which is filamentous, profusely branched. The filament consists of only one axial filament of the main axis which has been produced by a single apical cell cutting off the segments parallel to the base. The cell wall is two layered, the outer layer consists of pectin and the inner one of the cellulose. It reproduce by means of sexual as well as asexual means of reproduction.
Therefore, the right answer is option D.

Note:- It is found in fresh water as mentioned above in the region of Dehradun in cold weather. The sexual reproduction is advanced an takes place in between male and female sex organs which are known as antheridia and carpogonia, respectively. These plants may be monoecious or dioecious.