Question

Evolution

A. is the change in gene frequency within a population

B. always leads to progress toward adaptations

C. maintains the composition of a community

D. none of the above

Answer 1

Answer-

According to the given question-

Evolution – is defined as the change in characteristics of an organism over several generations through the process of natural selection.

Evolution is divided into –convergent evolution, parallel evolution, divergent evolution,   as well as co-evolution.

We also know that the new traits within a population occur due to transfer of genes from the organisms present in the populations, due to migration, or occurs between the species, due to horizontal gene transfer. But the evolution occurs when the heritable traits that are different from the other become rare or common within the population. Evolution also occurs through genetic drift or non-randomly due to natural selection.

Microevolution is defined as the evolution occurring on a small scale, such as a change in gene frequency or the alleles, in population over several generations.

Organisms adapt according to their changing environments and this also leads to the development of novel traits, also change in genes as well as leads to the evolution of new species.

Thus the correct answer is (A)