NEET BIOLOGY

Detailed explanation-1: -Answer: (d) All variations in a species do not have equal chances of survival. Some of the variations may be so drastic that the new DNA copy cannot work with the cellular apparatus it inherits. Such a newborn cell dies soon.

Detailed explanation-2: -It is true that all variations and mutations in species will not have equal chances to survive in the environment. According to ‘Survival of the fittest’, only the species which can adapt themselves to the environment can survive.

Detailed explanation-3: -Do all variations survive? No, variations do not survive. Variations that are not suitable or advantageous to the organism in the prevailing environmental conditions are not maintained.

Detailed explanation-4: -All the variations in a species do not have equal chances of survival because only the variations due to which a species can better adapt themselves to the environment can survive and will accumulate over time as these organisms with advantageous variations will be naturally selected over the others.

Detailed explanation-5: -Final answer: All the variations in a species have an equal chance of survival is not true with respect to variation.