Question 7 - Past Year - 5 Mark Questions - Chapter 8 Class 10 - How do Organisms Reproduce?

What is sexual reproduction? Explain how this mode of reproduction give rise to more viable variations than asexual reproduction? How does this affect the evolution?

Answer:

• Sexual reproduction is the mode of reproduction   which involves two parent organisms of opposite sex. In this mode of reproduction, the male gamete fuses with the female gamete to give rise to an offspring.

• In sexual reproduction, gametes are produced due to combining of DNA from 2 individuals , this results in the mixing of characteristics and gives rise to variations.

In asexual reproduction, a single parent produces offspring. So, there is no mixing of characteristics and hence no variation.

Thus, sexual reproduction give rise to more viable variations than asexual reproduction.

• The genetic variation in sexual reproduction leads to the continuous evolution of various species. Helpful variations accumulate over time and produce new species and result in  evolution.