Question

In organisms exhibiting internal fertilisation -

• A. Male gametes are always motile and female gametes are non-motile.
• B. Male gametes are either motile or non-motile, but female gametes are always non-motile.
• C. Male and female gametes are produced in equal numbers.
• D. Large number of organisms are produced.

Answer 1

The correct option is B

Male gametes are either motile or non-motile, but female gametes are always non-motile.

Internal fertilisation is seen in terrestrial animals and plants. In all these organisms, female gamete is non-motile. In animals and plants such as bryophytes and pteridophytes, male gametes are motile whereas in plants such as gymnosperms and angiosperms, they are non-motile. As female gametes are limited less number of offsprings are produced.