differences [2marks]

Question 12 Marks

Differentiate between internal fertilisation and external fertilisation.

Answer

Difference between internal fertilisation and external fertilisation are as follows

Internal fertilisation	External fertilisation
It is the fertilisation that takes place inside the female body.	It is the fertilisation that takes place outside the female body, generally in water.
Sperms are released in female body.	Sperms and ova are released in water, outside the female body.
It is common in terrestrial animals, e.g. humans, cats, dogs, etc.	It is very common in aquatic animals, e.g. frogs, fishes, etc.

Question 22 Marks

Give two differences between a zygote and a foetus.

Answer

Difference between a zygote and a foetus are as follows

Zygote	Foetus
It is formed by the fusion of male and female gamete.	It is formed by the developing embryo.
It is made up of single cell.	It is made up of many cells, in which all the body parts can be identified.

Science differences [2marks]