What is the basic difference between asexual and sexual reproduction?

State whether the following statements are True of False :

(a) Each sperm is a single cell.

(b) A new human individual develops from a cell called gametes.

(c) Egg laid after fertilization is made up of a single cell.

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

(e) External fertilization takes place in frog.

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

(g) Oviparous animals give birth to young ones.

(h) Internal fertilization takes place in hens.

(i) The hens give birth to chicks like human beings give birth to babies.

(j) Amoeba reproduces by budding.

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

(l) Fertilisation is necessary even in asexual reproduction.

(m) Cloning is a sexual reproduction method in mammals.

Fill in the following blanks with suitable words:

(a) The process of …………. ensure continuity of life on earth.

(b) The cells involved in sexual reproduction are called ……………..

(c) Fusion of gametes gives rise to a single cell called ………..

(d) The process of fusion of gametes is called ……..

(e) The other name of egg cell is …………….

(f) A sperm is much ………………. than an egg cell.

(g) In humans, one nature egg (or ovum) is released into oviduct every ………. by one of the ovaries.

(h) The egg laying animals are called ………… animals.

(i) The cow is a ………… animal whereas ostrich is an …………………. animal.

(j) The change of caterpillar into an adult silk moth is called ……………….

(k) The larva of frog is called ………….

(l) The two common methods of asexual reproduction in animals are ………. and …………………

(m) Dolly , the sheep, was produced by the technique called ………………….

Which of the following organisms reproduces by sexual and which by asexual method?

Amoeba, Cats Humans, Hydra, Birds

What is meant by the terms ‘internal fertilization and ‘external fertilisation’? Explain with example.