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Which is not correct for sponges?...

Which is not correct for sponges?

A

Internal fertilisation

B

External fertilisation

C

Gemmule formation

D

Gametes are formed from epidermal cells

Text Solution

Verified by Experts

The correct Answer is:
B
In sponges, sexes are not separate (hermaphrodite), i.e., eggs and sperms are produced by the same individuals. Sperms leave one sponge and enter another with water current to fertilise the ova (eggs) in situ. Thus, fertilisation is internal.
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Knowledge Check

  • Which is not a larva of sponge ?

    A
    Tornaria
    B
    Parenchymula
    C
    Stereogastrula
    D
    Amphiblastula

  • Which of the following statements is correct for sponges without exception?

    A
    They all have calcareous spicules.
    B
    They have high regenerative power.
    C
    They are found only in marine water.
    D
    They are all radially symmetrical.

  • Which is universal for sponges

    A
    Marine
    B
    Calcareous spicules
    C
    Radial symmetry
    D
    High regenerative power

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