Which of the following is needed for natural selection to occur?

select one:
a. variation in characteristics
b. differences in fitness
c. heritability of characteristics
d. all of the above

Option D.

Variation in characteristics, differences in fitness and heritability of characteristics are needed for natural selection to occur.

Explanation:

Natural selection is a basic means of evolution in which organisms living in an environment adapt and change it's reproducing genetic constitution to better adapt in its environment. Four conditions are needed for natural selection to occur and these are variation in fitness, reproduction, heredity and variation in individual organism characteristics in a population.

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

b exhibiting favoritism toward the kikuyu people.