Question 1

Which of the following best describes Darwin’s concept of 'descent with modification'?

Accepted Answer

All life is connected by common ancestry, and descendants accumulate adaptations to changing environments over time.

Question 2

Which of the following is NOT a requirement for a population to be in Hardy-Weinberg equilibrium?

Accepted Answer

Small population size

Question 3

A population of 1,000 iguanas has the following genotype frequencies: $$WW = 0.64$$, $$Ww = 0.32$$, $$ww = 0.04. $$What is the frequency of the $$w$$ allele?

Accepted Answer

$$0.2$$

Question 4

Which of the following is an example of a vestigial structure?

Accepted Answer

The human appendix

Question 5

Which mechanism of microevolution is most likely responsible for a drastic reduction in genetic diversity after a natural disaster?

Accepted Answer

Bottleneck effect

Question 6

Which of the following statements about natural selection is FALSE?

Accepted Answer

Natural selection always leads to perfectly adapted organisms.

Question 7

A population of beetles is exposed to a new pesticide. After several generations, most beetles are resistant. This is an example of:

Accepted Answer

Natural selection

Question 8

Which of the following best explains why prokaryotes can evolve more quickly than eukaryotes?

Accepted Answer

Prokaryotes reproduce more rapidly, allowing mutations to spread quickly.

Question 9

Which type of selection favors individuals at both extremes of a phenotypic range?

Accepted Answer

Disruptive selection

Question 10

In the Hardy-Weinberg equation $$p^2 + 2pq$$ + $$q^2 = 1$, what does 2pq$ represent?

Accepted Answer

The frequency of heterozygous individuals

Question 11

Which of the following is an example of artificial selection?

Accepted Answer

Humans breeding pigeons for specific feather patterns

Question 12

Which of the following is a real-world consequence of gene flow?

Accepted Answer

Alleles are transferred between populations, reducing genetic differences.

Question 13

Why is the Hardy-Weinberg equilibrium significant to public health science?

Accepted Answer

It allows scientists to estimate the frequency of carriers for genetic diseases.

Question 14

Which of the following is an example of heterozygote advantage?

Accepted Answer

Individuals with sickle-cell trait are more resistant to malaria.

Question 15

Which of the following is NOT a reason why natural selection cannot produce perfect organisms?

Accepted Answer

Natural selection creates new advantageous alleles on demand.

Question 16

Which of the following best describes the founder effect?

Accepted Answer

A few individuals colonize a new habitat, leading to a new gene pool.

Question 17

Which of the following is a direct result of sexual selection?

Accepted Answer

Phenotypic differences between males and females

Question 18

Which of the following is a source of genetic variation in sexually reproducing organisms?

Accepted Answer

Crossing over during meiosis

Question 19

Which of the following is the ultimate source of genetic variation?

Accepted Answer

Mutation

Question 20

Which of the following is an example of disruptive selection?

Accepted Answer

A population of birds where both very large and very small beaks are favored, but medium beaks are not.

How Populations Evolve: Study Notes for General Biology

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