NEET BIOLOGY

Detailed explanation-1: -The trillions of cells in the human body develop as a result of the fusion of two extremely specialized cells: an oocyte and a sperm. This process is essential for the continuation of our species, as it ensures that parental genetic information is mixed and passed on from generation to generation.

Detailed explanation-2: -The major function of the reproductive system is to ensure survival of the species. Other systems in the body, such as the endocrine and urinary systems, work continuously to maintain homeostasis for survival of the individual.

Detailed explanation-3: -Sexual reproduction ensures a mixing of the gene pool of the species. The variations found in offspring of sexual reproduction allow some individuals to be better suited for survival and provide a mechanism for selective adaptation to occur.

Detailed explanation-4: -Reproduction ensures the continuity of the species and keeps it from becoming extinct. It plays a role in evolution as it creates variations via genetic recombinations. It helps to increase the number of species in the ecosystem.

Detailed explanation-5: -The human reproductive system includes the male reproductive system which functions to produce and deposit sperm; and the female reproductive system which functions to produce egg cells, and to protect and nourish the fetus until birth.