Question 1

Which of the following best illustrates the concept of an emergent property in biological systems?

Accepted Answer

A single neuron can transmit electrical impulses, but a network of neurons can generate consciousness.

Question 2

Which of the following is NOT a unifying theme of biology?

Accepted Answer

Gravity

Question 3

A patient with a genetic mutation affecting the structure of hemoglobin experiences symptoms at multiple levels of biological organization. Which of the following levels is LEAST directly impacted by this mutation?

Accepted Answer

Ecosystem

Question 4

Which of the following best describes the process of natural selection?

Accepted Answer

Individuals with inherited traits that are better suited to the environment tend to leave more offspring than other individuals.

Question 5

In the evolution of lactase persistence, which condition is necessary for natural selection to increase the frequency of lactase-persistence alleles in a population?

Accepted Answer

Individuals with lactase persistence have more surviving offspring in dairying cultures.

Question 6

A researcher is studying the effect of increasing antibiotic concentration on bacterial growth inhibition. Which type of graph should be used to display the relationship between antibiotic concentration and inhibition of cell growth?

Accepted Answer

Line graph

Question 7

Which of the following is the best example of a control variable in an experiment testing the effect of temperature on enzyme activity?

Accepted Answer

The pH of the solution is kept constant in all test tubes.

Question 8

A population of beach mice colonizes a new area with light-colored sand. After several generations, most mice are light-colored. Which observation would provide the strongest evidence that this change is due to natural selection?

Accepted Answer

Predators capture dark-colored mice more frequently, and light-colored mice produce more surviving offspring.

Question 9

In a scientific experiment, which variable is plotted on the y-axis?

Accepted Answer

Dependent variable

Question 10

A researcher is investigating the relationship between caffeine dosage and reaction time. Which is the independent variable?

Accepted Answer

Caffeine dosage

Question 11

Which of the following best describes a scientific hypothesis?

Accepted Answer

A testable and falsifiable explanation for an observation or question.

Question 12

A patient has a mutation that causes improper folding of a protein responsible for transporting LDL cholesterol. This leads to increased plaque formation in arteries. Which level of biological organization is primarily disrupted?

Accepted Answer

Molecular

Question 13

Which of the following is the best example of an interaction as a unifying theme in biology?

Accepted Answer

A bee pollinates a flower, transferring pollen between plants.

Question 14

Which of the following best explains why both the A and S alleles for hemoglobin remain in populations where malaria is common?

Accepted Answer

AS individuals have greater reproductive success than either AA or SS individuals under conditions where malaria is common.

Question 15

A researcher collects data on the number of solute molecules that diffuse across a membrane at different time intervals. Which type of graph is most appropriate for showing how the number of solute molecules changes over time?

Accepted Answer

Line graph

Question 16

Which of the following best describes the relationship between energy and matter in biological systems?

Accepted Answer

Energy flows through ecosystems, while matter cycles within them.

Question 17

Which of the following is a correct sequence of levels of biological organization from smallest to largest?

Accepted Answer

Molecule → Organelle → Cell → Tissue → Organ → Organ System → Organism

Question 18

A scientist proposes that skin color variation in humans is due to differences in UV radiation exposure in ancestral environments. Which of the following is a testable hypothesis based on this idea?

Accepted Answer

Populations with higher ancestral UV exposure will have a higher frequency of alleles for darker skin pigmentation.

Question 19

In a region with low year-round UV radiation, which sequence best predicts how natural selection could alter skin pigmentation in a human population over many generations?

Accepted Answer

Heritable pigmentation variation → reduced UV creates different physiological costs and benefits among pigmentation variants → some variants are associated with greater reproductive success → allele frequencies change across generations.

Question 20

A researcher is examining how different levels of pollution affect the number of bird species in a given area. Which of the following is the dependent variable in this experiment?

Accepted Answer

Number of bird species

General Biology Chapter 1 Study Guide: Unifying Themes, Natural Selection, Scientific Inquiry, and Data Interpretation

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