Question

multiple select question
select all that apply
select all of the following criteria that must be present for natural selection to occur and cause evolutionary change in a population.
variation must result in differences in the number of offspring surviving in the next generation.
genetic variation must result in a visible phenotype (such as seed color, etc.).
variation must be the result of environmental differences.
variation must exist among individuals.
variation must have a genetic basis.

Explanation:

For natural selection to cause evolutionary change, there must be variation among individuals with a genetic basis, and this variation should lead to differences in offspring survival. Not all genetic - variation needs to result in a visible phenotype, and variation doesn't have to be only due to environmental differences.

Answer:

• Variation must result in differences in the number of offspring surviving in the next generation.
• Variation must exist among individuals.
• Variation must have a genetic basis.