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Reproduction In Animals

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Science

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Science

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

How are the young ones of frogs and other aquatic animals produced?


Frogs and many other aquatic animals lay their eggs and sperms in water. Females lay eggs in slow moving streams. The males also lay their sperms on the eggs. Eggs and sperms are produced in a very large amount because most of these get scattered away due to water, wind and rains. only a few come in contact with each other and get fertilized. They divide and grow into tadpoles. 


Choose the most appropriate answer :

A tadpole develops into an adult frog by the process of

  • fertilisation.

  • metamorphosis.

  • embedding.

  • budding.


B.

metamorphosis.


Choose the most appropriate answer :

Internal fertilisation occurs

  • in female body.

  • outside female body.

  • in male body.

  • outside male body.


A.

in female body.


Explain the importance of reproduction in organisms.


Reproduction is an important process as it ensures the continuation of similar kinds of individuals, generation after generation.


Choose the most appropriate answer :

The number of nuclei present in a zygote is

  • none.

  • one.

  • two.

  • four.


B.

one.


Describe the process of fertilisation in human beings.


The fusion of male and female gamete is called fertilization. Internal fertilization takes place in humans. Male releases sperms inside female’s body. Sperms and ovum fuse together in fallopian tube, during fertilization, the nuclei of the sperm and the egg fuse to form a single nucleus. This results in the formation of the zygote.