Explain the importance of reproduction in organisms.

Describe the process of fertilization in human beings.

Choose the most appropriate answer:

(a) Internal fertilization occurs

(i) in female body.

(ii) outside female body.

(iii) in male body.

(iv) outside male body.

 

(b) A tadpole develops into an adult frog by the process of

(i) fertilization.

(ii) metamorphosis.

(iii) embedding.

(iv) budding.

 

(c) The number of nuclei present in a zygote is

(i) none.

(ii) one.

(iii) two.

(iv) four.

Indicate whether the following statements are True (T) or False (F): (a) Oviparous animals give birth to young ones. ( )

(b) Each sperm is a single cell. ( )

(c) External fertilization takes place in frog. ( )

(d) A new human individual develops from a cell called gamete. ( ) (e) Egg laid after fertilization is made up of a single cell. ( )

(f) Amoeba reproduces by budding. ( )

(g) Fertilization is necessary even in asexual reproduction. ( )

(h) Binary fission is a method of asexual reproduction. ( )

(i) A zygote is formed as a result of fertilization. ( )

(j) An embryo is made up of a single cell. ( )

Give two differences between a zygote and a foetus.

Define asexual reproduction. Describe two methods of asexual reproduction in animals.

In which female reproductive organ does the embryo get embedded?

What is metamorphosis? Give examples.

Differentiate between internal fertilization and external fertilization.