Question

What is sexual reproduction.list it significant

Answer 1

It is a type of reproduction where male and female gamaetes fuse together to form a zygote.

Answer 2

Hope this will help you a lot friend
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1. Variations - Variations are essential for recognition, individuality and competitiveness. Sexual reproduction brings variations in almost all characters so that no two individuals are similar. 
2. Better Adaptability - Increased variability is helpful to organisms in better adaptability to changes in environment. 
3. Evolution - Genetic changes play an important part in evolution of new forms. 
4. Harmful Traits - Harmful Traits are often kept suppressed because of reshuffling of gene pairs that occurs during gamete formation and fusion.
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Hope this will help you a lot friend