Q40 of 100 Page 161

Why do female frogs (or female fish) lay hundreds of eggs?

The female frogs (or female fish) lay hundreds of eggs because there are fewer chances of surviving in that environment, so from 100 even if 5-10 survive, their species will survive. 

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38

Draw a labeled diagram of the human female reproductive system.


(a) Where in the human body does an egg (or ovum) get fertilized 


(b) Where does a fertilized egg (or zygote) develop into a baby in the human body?

 39

What types of fertilization takes place in the following?

(a) Cow (b) Frog


(c) Humans (d) Fish


(e) Hen

 41

What is meant by an ‘embryo’ ? Can we identify the body features in an embryo ?

 42

Give two differences between a zygote and a foetus.