Question

With the help of a diagram show the different stages of binary fission in amoeba

Answer 1

Step 1: During binary fission, the genetic material in the nucleus replicates by mitotic division. Here the nucleus firstly divides into two daughter nuclei by the process of karyokinesis.

STEP 2: After that cytokinesis takes place in which cytoplasm of parent amoeba divides into two daughter cells.

The two daughter cells have their own nucleus and cell organelles.

STEP 3: The binary fission in amoeba is irregular binary fission as the cytokinesis may take place along any plane but it is always perpendicular to the plane of karyokinesis.

STEP 4: During cytokinesis the cell produces proteins and nutrients.

5.Binary fission generally occurs when conditions are favorable i.e. when there is enough food, water and suitable temperature

Explanation:

1.Amoeba belongs to the kingdom protozoa. It is a eukaryotic unicellular organism. Unlike eukaryotic organisms they are anaerobic as amoeba has no mitochondria and generate ATP exclusively via anaerobic means.

2.Amoeba are of diverse nature and so have different reproduction methods which are – spores, binary fission and even sexually.

3.Binary fission is a type of asexual reproduction.Binary fission generally occurs when conditions are favorable i.e. when there is enough food, water and suitable temperature.

Answer 2

• Binary fission is an asexual way of reproduction in Amoeba in which the parent cell divides into two daughter cells. This approach involves karyokinesis first, followed by cytokinesis.