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प्रश्न
Animals exhibiting external fertilisation produce a large number of gametes. Pick the appropriate reason from the following.
विकल्प
The animals are small in size and want to produce more offsprings
Food is available in plenty in water
To ensure better chance of fertilisation
Water promotes production of large number of gametes
उत्तर
To ensure better chance of fertilisation
Explanation -
A large number of gametes are released by such animals to ensure better chance of fertilisation. Since, the gametes are laid in water, many of them are carried away by moving water, wind or rain and many are eaten by other animals.Therefore, production of large number of gametes is necessary.
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संबंधित प्रश्न
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Reproduction is an important process for the survival of an organism. Asexual reproduction occurs in different ways in plants. E.g. Vegetative propagation, fragmentation, budding, spore formation etc. Gametes are formed for sexual reproduction. In the animal kingdom, various methods like budding, binary fission, and parthenogenesis are used. There is no difference between males and females in the animals in which these methods are observed. The method of regeneration also creates new organisms. But regeneration is not the real method of reproduction. Regeneration is the process of healing wounds, creating new organs. This ability has completely disappeared in the developed animals. Modern research is being done on the method of sexual reproduction, e.g. Cloning. So, in the future women will be able to create their own offspring without a father.
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