Question 30:
(a) Explain the term ‘fertilisation’.
(b) Give some examples of different modes of fertilisation in nature ?
(c) What type of fertilisation takes place in (i) fish, and (ii) birds ?
Lakhmir Singh Biology Class 10
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Heya !!!
☆FERTILIZATION:-
》》The action or process of fertilizing an egg or a female animal or plant , involving fusion of male and female gametes to form a zygote .
》》It's also said as insemination , implantation .
》》The fusion of gametes takes inside or outside the body.
》》Plant fertilization is the joining of male and female gametes, resulting in a zygote .
☆The most generalized form of this process requires four steps :-
》》POLLINATION , GERMINATION AND FERTILISATION. After fertilization , the zygote divides to form an embryo.
》》Based on this fertilisation is based on - external or internal fertilisation .
☆EXAMPLE OF INTERNAL FERTILISATION :-
◇In MAMMALS , REPTILES , BIRDS , and some types of FISH the gametes meet inside of the female's body .
☆EXAMPLE OF EXTERNAL FERTILISATION:-
◇SALMON , COD, TROUT AND CHAR are all examples of the fishes that externally fertilize .
☆FERTILIZATION:-
》》The action or process of fertilizing an egg or a female animal or plant , involving fusion of male and female gametes to form a zygote .
》》It's also said as insemination , implantation .
》》The fusion of gametes takes inside or outside the body.
》》Plant fertilization is the joining of male and female gametes, resulting in a zygote .
☆The most generalized form of this process requires four steps :-
》》POLLINATION , GERMINATION AND FERTILISATION. After fertilization , the zygote divides to form an embryo.
》》Based on this fertilisation is based on - external or internal fertilisation .
☆EXAMPLE OF INTERNAL FERTILISATION :-
◇In MAMMALS , REPTILES , BIRDS , and some types of FISH the gametes meet inside of the female's body .
☆EXAMPLE OF EXTERNAL FERTILISATION:-
◇SALMON , COD, TROUT AND CHAR are all examples of the fishes that externally fertilize .
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