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Given figure of Hydra shows its reproduc...

Given figure of Hydra shows its reproductive structures and manner of fertilisation.
Observe and answer that why is it not showing self fertilisation ?

A

Distance between testis and ovary is more.

B

Sperms do not swim downwards.

C

Ovary matures earlier than testis.

D

Testis matures earlier than ovary.

Text Solution

Verified by Experts

The correct Answer is:
d
Cross fertilisation occurs in Hydra. The testic matures earlier than ovary. The spermotozoa released from the testic of one Hydra swim I water with their tails and finally come into contact with the ovum of another Hydra. Ovum lives only for a short time after it is exposed. During this period fertilisatiion must take place. Thus given figure is not showing self-fertilisation but cross fertilisation.
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