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How can we say that fish exhibits extern...

How can we say that fish exhibits external fertilisation?

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**Step-by-Step Solution:** 1. **Definition of External Fertilization:** External fertilization is a reproductive process where fertilization occurs outside the female's body. This is different from internal fertilization, where fertilization happens inside the female's body. 2. **Egg Laying by Female Fish:** In fish, the female lays eggs in the external environment, such as in water. This is a crucial step that indicates external fertilization. ...
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Organisms exhibiting external fertilisation

Why do gametes produced in large numbers in organisms exhibit external fertilisation ?

Knowledge Check

  • Given below are a few statements related to external fertilisation. Choose the correct statements. (i) The male and female gametes are formed and released simultaneously. (ii) Only a few gametes are released into the medium. (iii) Water is the medium in a majority of organisms exhibiting external fertilisation. (iv) Offspring formed as a result of external fertilisation have better chance of survival than those formed inside an organism.

    A
    (iii) and (iv)
    B
    (i) and (iii)
    C
    (ii) and (iv)
    D
    (i) and (iv)

  • How many from the following phylum has external fertilisation with indirect development ? {Porifera, Ctenophora , Echinodermata, Hemichordata }

    A
    Four
    B
    Three
    C
    Two
    D
    One

  • Assertion : Algae and fish produce a large number of gametes. Reason : Algae and fish show internal fertilisation.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

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