Question 1

Which of the following is NOT one of the seven characteristics required for an organism to be classified as living?

Accepted Answer

Ability to move independently

Question 2

A scientist observes that a certain virus can evolve and mutate to better suit its environment. According to the characteristics of life, which property does this observation best illustrate?

Accepted Answer

Evolution

Question 3

Which of the following best describes the difference between a hypothesis and a scientific theory?

Accepted Answer

A hypothesis is a tentative statement that can be tested, while a theory is a highly probable, well-tested, and substantiated explanation.

Question 4

If a DNA molecule contains 30% adenine (A), what percentage of the molecule would be cytosine (C)?

Accepted Answer

$$20\%$$

Question 5

Which of the following statements about RNA is correct?

Accepted Answer

RNA contains uracil instead of thymine.

Question 6

A mutation that results in the insertion or deletion of a nucleotide, causing a shift in the reading frame of the genetic code, is called:

Accepted Answer

Frameshift mutation

Question 7

Which process describes the synthesis of RNA from a DNA template?

Accepted Answer

Transcription

Question 8

Which of the following best illustrates the concept of natural selection?

Accepted Answer

Individuals with heritable traits that are beneficial for survival and reproduction become more common in a population over generations.

Question 9

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

Accepted Answer

The human appendix

Question 10

A population of birds is separated by a mountain range, leading to the formation of two distinct species over time. This is an example of:

Accepted Answer

Allopatric speciation

Question 11

Which mode of natural selection favors individuals with intermediate phenotypes and reduces genetic variation?

Accepted Answer

Stabilizing selection

Question 12

Which of the following best describes genetic drift?

Accepted Answer

Random changes in allele frequencies that are significant in small populations

Question 13

Which of the following is a real-world example of the founder effect?

Accepted Answer

A small population of cattle on Iceland descended from a single population from Norway

Question 14

Which of the following is a correct statement about homologous structures?

Accepted Answer

They are similarities resulting from common ancestry.

Question 15

Which of the following best describes balancing selection?

Accepted Answer

It maintains two or more forms in a population at relatively stable frequencies.

Question 16

Which of the following is an example of frequency-dependent selection?

Accepted Answer

Right-mouthed and left-mouthed fish, where the fitness of each type depends on its frequency in the population

Question 17

Which of the following is a key difference between exponential and logistic population growth?

Accepted Answer

Logistic growth includes the concept of carrying capacity, while exponential growth does not.

Question 18

Which of the following best describes sympatric speciation?

Accepted Answer

Speciation that occurs without geographic isolation, often due to polyploidy or reproductive barriers within a population

Question 19

Which of the following is a correct statement about the role of mutations in evolution?

Accepted Answer

Mutations are the ultimate source of all genetic variation.

Question 20

A researcher is studying a population of lizards and finds that individuals with either very long or very short tails have higher survival than those with intermediate tail lengths. Which mode of selection is most likely occurring?

Accepted Answer

Disruptive selection

General Biology: Foundations, Genetics, and Evolution Study Notes

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