Q37 of 100 Page 161

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

Internal fertilization: Fertilization which takes place inside the female body is called internal fertilization. Internal fertilization occurs in many animals including humans, cows, dogs and hens.

External fertilization: This type of fertilization in which the fusion of a male and a female gamete takes place outside the body of the female is called external fertilization. It is very common in aquatic animals such as fish, starfish, etc.


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36

What is the basic difference between asexual and sexual reproduction?

 36

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

Amoeba, Cats Humans, Hydra, Birds

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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?

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What types of fertilization takes place in the following?

(a) Cow (b) Frog


(c) Humans (d) Fish


(e) Hen