Question

which concept is part of the theory of evolution by natural selection?
a. new generations are better suited to survive than previous generations.
b. it is impossible to pass along traits from one generation to the next.
c. the best - adapted animals in a population cannot reproduce.
d. evolution can only cause small changes to a species.

Explanation:

According to the theory of evolution by natural selection, organisms with traits favorable for survival and reproduction are more likely to pass those traits to the next generation. Over time, this leads to new generations being better adapted (suited) to their environment compared to previous generations. Option B is incorrect because traits are passed from one generation to the next (inheritance is a key part of natural selection). Option C is wrong as the best - adapted animals are more likely to reproduce (survival of the fittest implies reproductive success). Option D is incorrect because evolution can lead to large - scale changes over long periods, such as the formation of new species.

Answer:

A. New generations are better suited to survive than previous generations.