Factors Affecting Biological Diversity-Standard Bio 4.4

Question 1

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

Revolt · Accepted Answer

an increase in available food

Question 2

In Wisconsin, a very large population of lake trout, in which individuals mate at random, experiences no migration, mutations, nor selective pressure for a number of years. Which of these is most likely to occur in the population?

Revolt · Accepted Answer

The gene pool of the population will remain relatively constant.

Question 3

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

Revolt · Accepted Answer

the amount of genetic variation in a population.

Question 4

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

Revolt · Accepted Answer

genetic variation

Question 5

Which of the following best defines gene flow?

Revolt · Accepted Answer

any movement of genes from one population to another

Question 6

Which of the following is least likely to change the gene pool of a population of chipmunks?

Revolt · Accepted Answer

A number of chipmunks die due to old age.

Question 7

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

Revolt · Accepted Answer

an increase in pollution

Question 8

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?

Revolt · Accepted Answer

an increase in gene flow between the bird populations

Question 9

A new pesticide has been introduced to the habitat of this population of beetles.Which describes the effect of this environmental change?

Revolt · Accepted Answer

decreased genetic variation

Question 10

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?

Revolt · Accepted Answer

Genetic variation will increase because of a new habitat and food source.

Factors Affecting Biological Diversity-Standard Bio 4.4 Answers

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