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Give reasons for the following: a. Com...

Give reasons for the following:
a. Compared to internal fertilization the external fertilization is disadvantageous to the animal.
b. Chances of survival of young ones are more in vivparous than in oviparous.

Text Solution

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a. A major disadvantages in external fertilization is that the offspring are extremely vulnerable to predators threatening their survival up to adult hood.
b. Because of proper embryonic care and protection, the chance of survival of young ones is greater in viviparous organisms.
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Give reasons for the following: Compared to internal fertilization, external fertilization is disadvantageous to the animal.

Give reasons for the following: Chances of survival of young ones are more in viviparous animals than in oviparous animals.

Knowledge Check

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

    A
    iii and iv
    B
    I and iv
    C
    ii and iv
    D
    i and iv

  • Given below are a few statements related to external fertilization. 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 fertilization. (iv) Offspring formed a a result of external fertilization 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

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