ZoologyWhich one of the following is not the characteristic of the phylum to which Pleurobrachia belongs?

Which one of the following is not the characteristic of the phylum to which Pleurobrachia belongs?

  1. A

    Bioluminiscence

  2. B

    8 external rows of ciliated comb plates

  3. C

    Commonly known as comb jellies

  4. D

    They are dioecious and show only the internal fertilisation

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    Solution:

    Sexes are not separate. Fertilisation is external with indirect development.

    Ctenophores are commonly known as sea walnuts or comb jellies.

    Bioluminescence (the property of a living organism to emit light) is well-marked in ctenophores.

    The body bears eight external rows of ciliated comb plates, which help in locomotion.

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