In protozoa, the function of contractile vacuole is the removal of excretory substances, carbon dioxide etc. It is very essential to regulate water content i.e., osmoregulation.

Correct Option: C

In protozoa, the function of contractile vacuole is the removal of excretory substances, carbon dioxide etc. It is very essential to regulate water content i.e., osmoregulation.

Binary fission in diatoms reduces the size of most daughters which is corrected through the development of auxospores. In some filamentous cyanobacterial forms unisexual reproduction occurs by hormogonia (hormocysts). They are identified by presence of biconcave (one disk or separation disc between two adjacent cells e.g. Oscillatoria).

Correct Option: D

Binary fission in diatoms reduces the size of most daughters which is corrected through the development of auxospores. In some filamentous cyanobacterial forms unisexual reproduction occurs by hormogonia (hormocysts). They are identified by presence of biconcave (one disk or separation disc between two adjacent cells e.g. Oscillatoria).

Contractile vacuole in Amoeba and Paramecium maintain the water balance of the cell. This is known as osmoregulation.

Correct Option: C

Contractile vacuole in Amoeba and Paramecium maintain the water balance of the cell. This is known as osmoregulation.

The Euglena is an organism, which possesses both the characteristics of plants and animals, as it can move with a flagella and also contains chlorophyll. Its nutrition is mixotrophic.

Correct Option: B

The Euglena is an organism, which possesses both the characteristics of plants and animals, as it can move with a flagella and also contains chlorophyll. Its nutrition is mixotrophic.

The thalloid body of slime moulds is made up of multinucleated cell which lacks septa in between and hence it is a multinucleated single celled mass called plasmodium.

Correct Option: A

The thalloid body of slime moulds is made up of multinucleated cell which lacks septa in between and hence it is a multinucleated single celled mass called plasmodium.