Question

During the life cycle of hydra, hatching
(a)Occurs
(b)Does not occur
(c)Sometimes occur
(d)Not possible

Answer 1

Hint: Hydra is the organism that performs budding which is the process of a sexual reproduction by which an outgrowth called bud is detached from the parent when fully mature.

Complete answer:
During the life cycle of hydra hatching, occurs. When the egg is ripe and in the ovary, the epidermis starts rupturing over it and withdraws to form a cup-like receptacle which consists of the exposed egg. They reproduce sexually or asexually depending on the conditions which are good which means the plentiful supply of the food and the optimum temperature. The polyp starts forming buds in the good conditions and along the side of its tubular body which grows into genetic clones of the adult and breaks off when they are fully formed. They are free to form implantation in the surrounding environment and will switch to sexual reproduction during the harsh conditions. It makes sense as sexual reproduction from an evolutionary perspective as it increases genetic variation in the population and overall survival which prospects for the species. It is triggered by the unfavourable conditions such as an increase in carbon dioxide contents and in crowded colonies which induce the formation of gonads.

Additional Information: Hydra is a freshwater organism which is taken into interest by the biologists due to its regenerative ability and they do not appear to die of old age. It has a tubular body with radially symmetric and a simple adhesive foot which is known as a basal disc which are the gland cells that secrete a sticky fluid which is used for its adhesive properties. They constitute a mouth at the free end of the body with mobile tentacles that are highly specialised stinging cells known as cnidocytes.
So, the correct answer is 'Occurs'.

Note: Hydra is taken into interest due to its regenerating property as they constitute many heads if you cut one it will grow more back in its place. They can die only through injury, disease and suitable conditions in the habitat or starvation.