Question

By which method, asexual reproduction occurs in amoeba?
A. Fission
B. Budding
C. Germination
D. All of the above

Answer 1

Hint: Amoeba reproduces by cell division, in which an amoebic cell is simply divided into two identical cells. First, the nucleus divides and then the cells. This process is almost similar to mitosis.

Complete answer:
An amoeba is a highly motile eukaryotic, unicellular organism. Amoeba reproduce by binary fission. The most common way is Binary fission. For this the amoeba becomes spherical and nucleus divides by mitosis, the cytoplasm divides from the center and forms two daughter cells. Multiple fissions also occur in amoeba and in some harsh conditions amoera form spores.
> So, our first option is fission. As we already mentioned fission is simple mitosis and amoeba generally reproduces by binary fission.

> Next option is budding. In budding, bud develops as an outgrowth due to many cell divisions at one site. These buds develop into tiny individuals and, when fully mature, detach from the parent body and become new independent individuals. Budding is seen in Hydra.

> The 3rd option is germination. Germination is usually the growth of a plant contained within a seed. It is generally seen in seed bearing plants.

Hence, The correct answer is option (A).

Additional information:
Fission can be multiple or binary. In multiple fissions, an amoeba undergoes multiple cell division and form multiple daughter nuclei, then the cytoplasm divides to form multiple amoeba.

Note: Amoebas reproduce approximately every two days, depending on the species and environmental conditions. So, we can say that the lifespan of an amoeba is two days, after two days an amoeba converts into daughter cells.