Question 1

Which of the following best describes the prevailing scientific view regarding the age of the Earth and species in Europe during the early 1800s?

Accepted Answer

Species were thought to be immutable, and the Earth was considered to be only a few thousand years old.

Question 2

James Hutton is known for proposing the hypothesis of gradual and consistent geologic change. Which concept did he introduce, and what equation did he use to estimate the age of geological formations?

Accepted Answer

Uniformitarianism; $$t = \frac{d}{r}$$, where $$t is $$time, $$d is $$depth of sediment, and $$r is $$rate of sedimentation.

Question 3

During his voyage, Darwin observed that finches on different Galapagos Islands had distinct beak shapes. What biogeographical pattern does this observation support?

Accepted Answer

Adaptive radiation, where a single ancestral species diversifies into multiple species adapted to different environments.

Question 4

Which process did Darwin use as evidence for descent with modification, and what is the main difference between this process and natural selection?

Accepted Answer

Artificial selection; in artificial selection, humans choose which traits to propagate, while in natural selection, environmental pressures determine which traits are favored.

Question 5

Succession is a process observed in ecological communities. How does succession provide evidence for descent with modification?

Accepted Answer

Succession shows gradual changes in species composition over time, indicating that species can change and adapt to new conditions.

Question 6

Which of the following is an example of dispersal leading to the establishment of populations in new habitats?

Accepted Answer

Seeds carried by wind to a remote island, where they germinate and form a new plant population.

Question 7

Adaptive radiation is a key concept in evolutionary biology. Which equation best represents the increase in species diversity ($$D) $$over time ($$t) $$due to adaptive radiation, assuming a constant rate ($$r$$)?

Accepted Answer

$$D = D_0$ + r t$$

Question 8

Local adaptation can lead to increased differences between populations. Which scenario best illustrates this concept?

Accepted Answer

Two populations of the same species living on different islands develop distinct traits due to unique environmental pressures.

Question 9

Darwin's Origin of Species introduced two major ideas. Which of the following correctly identifies them?

Accepted Answer

Descent with modification and natural selection.

Question 10

A scientist observes that a population of beetles on an island has developed a thicker shell compared to its mainland relatives. Which evolutionary process most likely explains this difference?

Accepted Answer

Local adaptation due to different environmental pressures on the island.

Question 11

Which of the following best explains why Darwin's observations of biogeographical patterns on his voyage supported the theory of evolution?

Accepted Answer

He found that related species on different islands had adapted to local environments, suggesting common ancestry and divergence.

Question 12

Which equation can be used to model the change in allele frequency ($$p) in a $$population due to natural selection over one generation, given selection coefficient $$s$$ and initial frequency $$p_0$$?

Accepted Answer

$$p = p_0$ + s p_0$ (1 - p_0$)$$

Question 13

Artificial selection has been used to produce many domesticated species. Which of the following is a real-world example of artificial selection?

Accepted Answer

Breeding dogs for specific traits such as size or temperament.

Question 14

Which of the following statements about dispersal is correct?

Accepted Answer

Dispersal allows organisms to colonize new habitats, which can lead to speciation if populations become isolated.

Question 15

A population of lizards is split by a river, and over time, the two groups develop different coloration. Which evolutionary mechanism is most likely responsible for this change?

Accepted Answer

Local adaptation due to different environmental conditions on each side of the river.

Question 16

Which of the following best describes the process of adaptive radiation observed in Galapagos finches?

Accepted Answer

A single ancestral species gives rise to multiple species, each adapted to a different ecological niche.

Question 17

Which formula can be used to estimate the time ($$t) $$required for a population to double in size, given a constant growth rate ($$r$$)?

Accepted Answer

$$t = \frac{\ln 2}{r}$$

Question 18

Which of the following is NOT a prediction made by the hypothesis of gradual and consistent geologic change?

Accepted Answer

Major geological features are formed by sudden, catastrophic events.

Question 19

Which of the following best explains why artificial selection was important to Darwin's understanding of evolution?

Accepted Answer

It demonstrated that selective breeding could produce significant changes in organisms over relatively short periods.

Question 20

Which of the following is a direct consequence of adaptive radiation in island populations?

Accepted Answer

Increased species diversity as populations adapt to different ecological niches.

Evolutionary Biology: Key Concepts and Learning Objectives (BILD 3, Fall 2025)

Guida di studio - Domande di pratica

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