Question

Type of asexual reproduction found in hydra is
A. Gemmule formation
B. Sporulation
C. Binary fission
D. Budding

Answer 1

Hint: Hydra reproduces by asexual mode of reproduction. This is a small freshwater creature having radial symmetry and belongs to the phylum Cnidarian and class Hydrozoa. Because they possess the ability for regeneration, many biologists are interested in them. Their body is approximately 10mm long.

Complete answer:
Gemmules are defined as endogenous buds that are found in sponges and are involved in asexual reproduction. It is the mass of cells that is capable of developing into a new organism i.e. an adult sponge. The process of building spores from vegetative cells during unfavorable environmental circumstances is known as sporulation. It is the type of asexual reproduction in which duplication of genetic material occurs and the body of the organism splits into two new bodies. Such fission is known as Binary fission. Budding is the kind of asexual reproduction in which the fusion of gametes does not occur. Because of the cell division at one particular location, a new organism evolves in the form of an outgrowth or bud. The bud stays bound to the parent plant and separates from there when it becomes mature and it leaves a scar at the point of detachment. The newly created individual is a clone of its parent cell.
So, the correct answer is “Option D”.

Note:
Hydra is a freshwater polyp and has a cylindrical body with a ring of tentacles, enclosing the mouth. It reproduces asexually only when resources are sufficient and low population density is favored. But, when food scarcity occurs and high population density is favored, they reproduce sexually to increase the genetic variation and help the progeny to adapt to the newer ecosystem.