Question

Which among the following is the mode of reproduction in Unicellular organisms?
(a)Budding
(b)Fragmentation
(c)Multiple Fission
(d)All of the above

Answer 1

Asexual reproduction is the kind of reproduction that doesn't involve the fusion of gametes or change within the number of chromosomes. The offspring that arise by asexual reproduction from one cell or from a multicellular organism inherit the genes of that parent.

Complete answer:
Unicellular organisms generally undergo asexual means of reproduction. Asexual reproduction is the type of reproduction in which a single parent is involved and the offspring arise from one organism and inherit the genes of that parent only. There are various agamogenesis methods by which the unicellular organisms divide.
Budding is the kind of reproduction by which offspring arise from one organism.
Fragmentation is a type of reproduction during which an organism is split into mature, adult individuals that are clones of the original organism.
Multiple fission is the type of reproduction in which the parental body divides into many daughter cells simultaneously during the unsuitable conditions.

Additional Information:
The process of reproduction in Spirogyra is said to be as fragmentation, where the body of spirogyra when matures will get cleaved into many smaller pieces or fragments because of strong water current. These separated pieces will then grow into new individuals.
Multiple fission in Amoeba: it's a unicellular organism. To remain and to reproduce under unsuitable conditions, Amoeba withdraws its pseudopodia and becomes almost round in shape. It produces a hard covering around its cell called a cyst. The cyst makes it into a thick protective coating around the cell. After nuclear division, cytoplasmic division occurs. Therefore, many new daughter cells are formed from the parent cell. On the return of favorable conditions, the cyst bursts open to release these daughter cells into the environment.
Budding occurs in Hydra. In this process, the parent cell is not destroyed and a new daughter cell is formed. The hydra uses the regenerative c15/10 Ready to goells to provide in this manner. The newly formed hydra grows in the form of a bud and stays attached to the parental body while it grows.
So, the correct answer is, ‘All of the above.’

Note: -Fragmentation is similar to regeneration but has a slight difference. Fragmentation is the breaking of an organism from itself to grow into a new individual while regeneration is where the organism is capable of regrowing certain body parts when they are lost.
-In asexual reproduction, the daughter cells are identical to each other, both physically as well as genetically. So, they are called ‘clones.’ Asexual reproduction occurs in both unicellular and multicellular organisms.
- Budding is most ordinarily associated with both multicellular and unicellular organisms.