Question 1

Which of the following best describes a key aspect of Darwin's theory of natural selection?

Accepted Answer

Individuals with advantageous traits are more likely to survive and reproduce, passing those traits to the next generation.

Question 2

Natural selection is a mechanism of which biological process?

Accepted Answer

Evolution

Question 3

In biological terms, how is 'fitness' most accurately defined?

Accepted Answer

The number of offspring an organism produces that survive to reproduce themselves.

Question 4

Which scenario best illustrates the effect of abiotic factors on the rate of evolutionary change in a population?

Accepted Answer

A drought reduces available water, favoring plants with deeper roots.

Question 5

Which of the following is an example of natural selection in action?

Accepted Answer

Moths with coloration matching tree bark surviving better in polluted areas.

Question 6

How can phenotypic variation within a population affect the fitness of organisms?

Accepted Answer

Variation allows some individuals to be better adapted to changing environments, increasing their fitness.

Question 7

Which of the following best explains how humans can affect genetic diversity within a population?

Accepted Answer

By selectively breeding organisms for desired traits, reducing genetic diversity.

Question 8

Which statement correctly compares artificial selection and natural selection?

Accepted Answer

Artificial selection is driven by human choice, while natural selection is driven by environmental pressures.

Question 9

Which type of scientific evidence for evolution is provided by the similarity of DNA sequences between humans and chimpanzees?

Accepted Answer

Biochemical evidence

Question 10

A population of beetles has green and brown color morphs. After a forest fire, the ground is covered in dark ash. Which outcome is most likely due to natural selection?

Accepted Answer

Brown beetles will become more common because they are better camouflaged.

Question 11

Which equation is commonly used to calculate allele frequencies in a population under Hardy-Weinberg equilibrium?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 12

Which of the following is NOT a source of evidence for evolution?

Accepted Answer

Astrological predictions

Question 13

A scientist observes that finches on different islands have different beak shapes suited to their food sources. This is an example of which type of evidence for evolution?

Accepted Answer

Geographic evidence

Question 14

Which factor would most likely increase the rate of evolutionary change in a population?

Accepted Answer

High mutation rate

Question 15

Which of the following best describes the role of biotic factors in natural selection?

Accepted Answer

They include living elements like predators and competitors that influence survival and reproduction.

Question 16

If a population is exposed to a new disease, which individuals are most likely to survive according to the principles of natural selection?

Accepted Answer

Individuals with genetic resistance to the disease.

Question 17

Which of the following is a mathematical model used to predict changes in allele frequencies due to genetic drift?

Accepted Answer

$$\Delta p = \frac{1}{2N}$$

Question 18

Which of the following statements about artificial selection is true?

Accepted Answer

It is a process where humans select for desirable traits in organisms.

Question 19

Which physical evidence supports the theory of evolution?

Accepted Answer

The presence of homologous structures in different species.

Question 20

A population of rabbits is introduced to a new environment with many predators. Over several generations, the average speed of the rabbits increases. What is the most likely explanation?

Accepted Answer

Natural selection favoring faster rabbits who escape predators.

Natural Selection and Evidence for Evolution: Study Notes

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