Question

While observing permanent slide of Amoeba, Ramesh saw oval-shaped nucleus, this indicates
A. Binary fission
B. Budding
C. Multiple fission
D. None of these

Answer 1

Hint: Amoeba is a single cell organism that has the ability to change its shape. It belongs to the family Amoebidae. Amoeba proteus is the most common species that is widely used in laboratories.

Complete answer: Reproduction is the ability of the organism to increase its number. There are two modes of reproduction, that is, asexual and sexual mode of reproduction. Asexual reproduction is a type of reproduction involving single parent. There are different types of asexual reproduction such as binary fission, multiple fission, budding, regeneration and fragmentation.
Budding is a type of reproduction in which a bud or outgrowth arises from the parent plant at a particular site. This bud grows when it remains attached to the parent plant and gets detached once it gets matured. This type of asexual reproduction is common in Hydra.

Fission is a type of asexual reproduction in which an organism divides into two by duplicating its genetic material. Amoeba divides by a fission known as binary fission. Through this process, two daughter cells (new Amoeba formed after fission) are produced which are of equal sizes.

Multiple fission occurs in Plasmodium that causes Malaria. In this type of asexual reproduction, nucleus divides repeatedly through mitosis to form several nuclei. After the nuclear division, each nuclei will separate and form a new individual.
So, when Ramesh observed a permanent slide of Amoeba, he found oval shaped structures which indicates that binary fission is taking place.
So, the correct answer is option A) Binary Fission.

Note: Binary fission is the asexual mode of reproduction in which the organism divides by splitting of the parent cell. It occurs in Amoeba, bacteria, Euglena exhibits binary fission.