Question

Amoeba is immortal because
A. Parental body is distributed among the offspring during binary fission
B. It is microscopic
C. It reproduces by sexual method only
D. It is multicellular

Answer 1

Hint: Amoeba is an unicellular organism. It has the ability to change the shape of itself and it catches food by extending the fingerlike projections of protoplasm and it is a eukaryote.

Complete answer:
Amoeba is immortal because its parental body is distributed among the offspring during the binary fission. Binary fission is a type of asexual reproduction and it occurs in many single –celled organisms such as bacteria, Amoeba and paramecium.
In binary fission, the parent organism divides into two equal daughter cells with the same amount of genetic material. It involves mitotic division (cytokinesis resulting in the formation of daughter cells) in the nucleus of amoeba.
Binary fission is divided into two types on the basis of plane of division:
> Simple or irregular binary fission: In this division occurs through any plane, e.g., Amoeba.
> Longitudinal binary fission: In this fission, the plane of division passes along the longitudinal axis of the organism, e.g., Euglena.
> Transverse binary fission: In this fission, the plane of division passes through the transverse axis of the organism, e.g., Paramoecium and bacteria.

Note: The scientists use the term ‘amoeboid’ and ‘amoeba’ for any organism that exhibits amoeboid movement (mode of locomotion in eukaryotic cells). In this process, the parent body acts as a reproductive unit.