Question

Which of the following statement is true for variation in organisms?
(P) The occurrence of differences among the individuals of the same species is known as variation.
(Q) Variations decrease the possibilities of survival.
(R) The process of evolution decreases the variation in organisms.
(S) During meiosis, crossing over takes place between the genes and hence, combinations are formed, which ultimately results in producing variations.

• A. (P) and (S)
• B. (Q) and (S)
• C. (P) and (R)
• D. (Q) and (P)

Answer 1

The correct option is A (P) and (S)

During gamete formation, in meiosis, crossing over takes place and genes are exchanged which results in variations in organisms. Variations are the reasons why individuals of the same species differ from each other. It also increases the possibility of survival as more adventitious variations accumulate in the species and help in the process of evolution.

Thus, the correct answer is option A.