Factors Affecting Genetic Variation Answers

In a few generations, this population of beetles changed. Which is the most likely explanation for the change?

A group of students is walking in the park, and one of them takes a picture of a pollen grain that is being blown by the wind. What caption can the student use for this picture?

Which term best describes the difference in colors of the birds below?

Environmental factors can influence natural selection because they can increase or decrease

A population of snakes that eat small rodents enters a new habitat. In the new habitat, there are many species of rodents, and their populations are high because there are few natural predators. What will most likely be the effect on the genetic variation of the snake population?

Genetic drift in a population affects the gene pool in which of the following ways?

Which environmental factor would likely lead to an increase in genetic variation in a population of squirrels?

Which environmental factor could lead to a decrease in genetic variation in a population of tuna?

A population of birds lives on a small island. Another population of the same species lives on the mainland. The distance between the island and the mainland is too great for birds to fly back and forth. Recently, a series of sandbars and tiny islands have formed between the island and the mainland. What is the most likely effect of this?

Which would most likely result in an increase in genetic variation in a population?