Chapter 7: How Do Organisms Reproduce?

Chapter 7: How Do Organisms Reproduce? Class X Science Key Concepts Reproduction is the biological process that ensures continuity of life on earth. It is the process by which living organisms produce new individuals similar to themselves. Types of Reproduction Reproduction may be sexual or asexual. Sexual reproduction gives rise to new genetic combinations by fusion of gametes, leads to variation, and promotes evolution. A. Asexual Reproduction It involves only one parent. There is no formation and fusion of gametes. The young ones formed are almost identical to each other as well as to the parent cell. Generally occurs during favourable environmental conditions and when there is an abundance of food. B. Sexual Reproduction Two individuals i.e., one male and one female are needed to give rise to a new individual. Gametic fusion takes place. Since gametes are derived from two different organisms, it results in a new combination of genes which increases the chances of genetic variations. Results in …