Question

Binary fission is longitudinal in
A. Paramecium
B. Vorticella
C. Amoeba
D. Plasmodium

Answer 1

Hint: Longitudinal binary fission is an asexual reproduction which means there is absence of male and female gametes only single parent is capable of forming the new organism.

Complete Answer:
- All the given names paramecium, vorticella, amoeba and plasmodium reproduce asexually only.
- Paramecium has a transverse type of fission so this option is not correct.
- Vorticella is a protozoan and it belongs to the phylum Ciliophoran and also has a bell shape or cylindrical shape as its structure. They are found in freshwater bodies such as ponds, lakes, etc.
- Amoeba does not have a proper set plane as its body is irregular making it very clear that it cannot go through longitudinal binary fission.
- Now in plasmodium the nucleus divides into many subunits which ultimately lead to multiple fission.

So, the option B is correct as we can see that vorticella has a proper shape which can make it go through a longitudinal binary fission.

Note: It is noted that vorticella has the capability to divide by longitudinal region as it has a proper cylindrical structure. During the binary fission the genetic material first replicates or elongates depending on the type of the fission it goes through.