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what is sexual reproduction
only class 8 student
Answers
For your standard a general defination of sexual reproduction is sufficient I.e. sexual reproduction refers to an union of two gametes to form an new individual.
SEXUAL REPRODUCTION TAKES PLACE IN THE FOLLOWING WAYS
1.The male parent produces male gametes (male sex cells) called sperms. The sperm is a small cell with a long tail (flagellum) for movement.
2. The female parent produces female gametes (female sex cells) called ova (or eggs). The ovum (or egg) is a much bigger cell than the sperm, having a lot of cytoplasm.
The sperm enters into the ovum (or egg) and fuses with it to form a new cell called 'zygote'. This process is called fertilisation. So, the zygote is a fertilised ovum (or fertilised egg)-
4. The zygote then divides again and again to form a large number of cells (all of which remain together). And ultimately zygote grows and develops to become a new baby.
From the above discussion we conclude that the whole process of sexual reproduction in animals involves the formation of sperms and eggs; joining together of sperm and egg to form a zygote and then the growth and development of zygote to form a baby animal.
In complex multicellular animals (like human beings) there are special reproductive organs to make sperms and eggs; to bring together sperms and eggs for fertilisation; and for the growth and development of zygote into a baby.
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