Question

Choose odd one with respect to direct cell division.

• A. Blue green algae
• B. Mycoplasma
• C. E.coil
• D. Amoeba

Answer 1

The correct option is A Blue green algae

A. Blue green algae or cyanobacteria reproduce asexually by means of binary or multiple fission both in unicellular and colonial forms and sometimes through sporulation and fragmentation also.

B. Mycoplasma, the smallest living organism divides by binary fission in two daughter cells.

C. E. coli reproduce asexually by binary fission and each cell divides into two daughter cells.

D. Amoeba, a unicellular protozoan, divides into two daughter cells by means of binary fission.

Direct cell division or amitosis is a kind of cell division in which the parent cell divides into two daughter cells which are not equal in size. It is rare and seen in some unicellular organisms such as bacteria, diatoms, protozoans, etc.

Hence, blue green algae do not show direct cell division.

So, the correct answer is 'Blue green algae'.