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Saturday, 16 November 2019

What Is Reproduction full definition ( Science ) class 9th NCERT Syllabus

Reproduction 

It is defined as a bilogical process by which a new individual or off spring are produced from their existing parents.

Types of Reproduction :-

Reproduction is mainly redivide into TWO types

(b) Asexual reproduction 
(a) Sexual reproduction 




Definition


(a) Sexual reproduction 

The mode of reproduction in which there is an involvement of sex cells or gamates i.e sperm and ovum/egg is termed as sexual reproduction male and female are necessary.
Example:- Reproduction in humans


Sexual reproduction in animals
sexual reproduction mainly takes places in multicelluar organisms, invertebrates and animals having mammary gland because during sexual reproduction there should be involment of sex cell which is also known as Gamates. gamates is produced during sexual copulation between male and female.


(b) Asexual reproduction 

The mode of reproduction in which there is absence or sex cell does not take place during reproduction, such mode of reproduction is termed as Asexual reproduction.
Single parent performs asexual reproduction.


What is Sex cell

The cells of male and female which is produced during sexual copulation between male and female i.e Sperm by male and or egg by female.
or
The cells involved in sexual reproduction are known as sex cell or gamates.




     

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