Question

An embryonated egg of Hydra gives rise to a

• A. Hydrula
• B. Ephyra
  
• C. Planula
• D. None of the above

Answer 1

The correct option is C Planula

Hydra reproduces asexually by budding, where young polyps become detached from the parent when they are fully developed.
The mature polyps develop gonads on the external body wall. After fertilisation, the zygote undergoes complete cleavage and a hollow blastula is formed which changes into a solid stereogastrula whose ectodermal cells acquire cilia. This stereogastrula changes into free-swimming planula (larva). Planula attaches itself to the hard substrata and transforms into the young Hydra through metamorphosis.

Therefore, the correct answer is option C.