Explain the importance of reproduction in organisms.

3

(a)

Describe the process of fertilisation in human beings.

3

(a)

Give two differences between a zygote and a foetus.

3

(a)

Choose the most appropriate answer.
The number of nuclei present in a zygote is
(i) none
(ii) one
(iii) two
(iv) four

3

(a)

In which female reproductive organ does the embryo get embedded?

3

(a)

What is metamorphosis? Give examples.

3

(a)

It is necessary to produce large number of eggs and sperms by the animals which reproduce by external fertilisation. Why?

3

(a)

Although two cells called gametes fuse, the product formed is a single cell called zygote, Justify.

3

(a)

Can a woman with a blocked Fallopian tube give birth to a baby? How?

3

(a)

Name the different stages of the cockroach.

3

(a)

Mother gives birth to a baby but the baby has characters of both parents. How is this possible?

3

(a)

A single cell becomes such a big individual How?

3

(a)

Draw a labelled diagram of female reproductive organs.

3

(a)

Why does the new individual inherit some characteristics from the mother and some from the father?

3

(a)

How does external fertilization take place? Explain with an example

3

(a)