Question 1

Which of the following best describes the Central Dogma of molecular biology?

Accepted Answer

DNA is transcribed into RNA, which is then translated into protein.

Question 2

A population of beetles is exposed to a pesticide. Over several generations, most beetles become resistant. Which evolutionary mechanism is most likely responsible for this change?

Accepted Answer

Natural selection

Question 3

Which of the following is NOT a requirement for natural selection to occur in a population?

Accepted Answer

All individuals must have identical genotypes.

Question 4

Which equation represents the Hardy-Weinberg equilibrium for allele frequencies in a population?

Accepted Answer

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

Question 5

A population of lizards on an island is split into two groups by a river. Over time, the two groups develop different coloration and mating behaviors. This is an example of:

Accepted Answer

Allopatric speciation

Question 6

Which of the following best explains why skin color in humans varies with latitude?

Accepted Answer

Natural selection favored darker skin near the equator to protect from UV radiation.

Question 7

Which of the following is a correct statement about the Linnaean classification system?

Accepted Answer

It organizes living things into a hierarchy: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

Question 8

Which of the following is an example of adaptive radiation?

Accepted Answer

Darwin's finches evolving different beak shapes on the Galápagos Islands.

Question 9

In a food web, which group is responsible for converting solar energy into chemical energy?

Accepted Answer

Primary producers

Question 10

Which process in the nitrogen cycle makes nitrogen available to living things?

Accepted Answer

Nitrogen fixation

Question 11

A scientist observes that two species of birds occupy the same tree but feed on different insects. This is an example of:

Accepted Answer

Resource partitioning

Question 12

Which of the following best describes the role of decomposers in an ecosystem?

Accepted Answer

They break down dead organisms, recycling nutrients back into the environment.

Question 13

Which of the following is a direct consequence of burning fossil fuels?

Accepted Answer

Increased carbon dioxide in the atmosphere

Question 14

Which of the following is a density-dependent factor that can limit population growth?

Accepted Answer

Competition for resources

Question 15

Which equation best represents the exponential growth of a population?

Accepted Answer

$$N_t = N_0$ e$$^{rt}$$

Question 16

Which of the following is an example of a mutualistic relationship?

Accepted Answer

Bees pollinating flowers while feeding on nectar

Question 17

Which of the following best explains why genetic drift has a greater effect in small populations?

Accepted Answer

Random changes in allele frequencies are more likely to significantly alter the gene pool.

Question 18

Which of the following is a major threat to biodiversity caused by human activity?

Accepted Answer

Habitat destruction

Question 19

Which process in the water cycle is responsible for moving water from land to the atmosphere?

Accepted Answer

Evaporation

Question 20

Which of the following is a consequence of increased atmospheric CO$$_2$$ due to human activities?

Accepted Answer

Global climate change

Comprehensive Study Guide: Evolution, Ecology, and Biological Systems

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