Question

The unicellular organisms which reproduce by binary fission , are considered as immortal. justify?


class 12th CBSE Biology sample paper

Answer 1

Unicellular organism there is no special structure for reproduction. In binary fission, the entire parent body constitute the reproductive unit and disappear when its division into two daughter unicellular cell is completed.

These two daughter cell functions as two new individuals.

There is no remains of parent body cell and parent can not be said to have died. In fact after binary fission parent continues living as two daughter individual. Hence, the unicellular organisms which undergoes binary fission are called immortal.

Example: Amoeba and Paramecium.