Give reason: Organisms exhibiting external fertilization show great synchrony between the sexes and release a large number of gametes into surrounding medium.

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Solution

Synchrony between sexes ensures that gametes are released at the nearly same time in the external medium. While a large number of gametes are released so that even if a large number of them are destroyed, few of them remain viable for fertilisation.
Both of these measures are evolved to increase the chances of fertilisation.

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Similar questions

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 as 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.

Q. Question 4
Animals exhibiting external fertilization produce a large number of gametes. Pick the appropriate reason from the following.

(a) The animals are small in size and want to produce more offsprings.
(b) Food is available in plenty in water.
(c) To ensure better chance of fertilization
(d) Water promotes the production of a large number of gametes

Q. Question 4
Animals exhibiting external fertilization produce a large number of gametes. Pick the appropriate reason from the following.

(a) The animals are small in size and want to produce more offsprings.
(b) Food is available in plenty in water.
(c) To ensure better chance of fertilization
(d) Water promotes the production of a large number of gametes

Q. Animals exhibiting external fertilisation produce a large number of gametes. Pick the appropriate reason from the following.

Q. 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.

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