Question

The mode of asexual reproduction of Euglena is
A) Transverse binary fission
B) Irregular binary fission
C) Multiple fission
D) Longitudinal binary fission.

Answer 1

Hint: In asexual reproduction, only one parent is needed, offspring are identical. These offsprings are produced by the mitosis process. Binary fission is a kind of asexual mode of reproduction. Here the bacteria divides into two equal halves. This process starts with the duplication of the genetic contents of a parent cell by the process of replication. The important point of binary fission is the division of the nucleus.

Complete answer:
A) Transverse binary fission – In this case, binary fission takes place in the transverse. It happens in planaria, paramecium. So it is the wrong option.
B) Irregular binary fission –This type of fission is shown in amoeba. So it is the wrong option.
C) Multiple fission - Here instead of 2 daughter cells, they produced many daughter cells from the parent cell. This type of reproduction occurs in plasmodium. So it is the incorrect option.
D) Longitudinal binary fission – In this case, binary fission takes place in a longitudinal plane. Euglena shows this type of fission. Thus it is the correct option.

Therefore, the correct option is D) longitudinal binary fission.

Note: In the longitudinal binary fission, Euglena reproduces asexually through binary fission. Reproduction starts with the mitosis process of the cell nucleus and then the division of the cell takes place. Euglena division takes place in a longitudinal plane, beginning at the front end of the cell, with the duplication of flagellar processes, gullet, and stigma than the whole body.