Question 1

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

Accepted Answer

A property that arises from the interaction and arrangement of parts within a system, not present in the individual components.

Question 2

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

Accepted Answer

Molecule → Organelle → Cell → Tissue → Organ → Organ System → Organism → Population → Community → Ecosystem

Question 3

A patient has a genetic mutation that causes improper folding of a protein responsible for transporting LDL cholesterol in the blood, leading to increased plaque formation in coronary arteries. Which level of biological organization is primarily disrupted?

Accepted Answer

Molecular

Question 4

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

Accepted Answer

All individuals in the population must be genetically identical.

Question 5

In the evolution of lactase persistence in human populations, which observation would MOST strongly support natural selection as the explanation for increased frequency of lactase-persistence alleles?

Accepted Answer

Lactase-persistence variants are inherited, and under historical conditions associated with dairying, individuals carrying them produced more surviving offspring than noncarriers.

Question 6

Which of the following best describes the process of science?

Accepted Answer

A cyclical process involving observation, hypothesis formation, experimentation, data analysis, and revision of hypotheses.

Question 7

A researcher is studying the effect of different concentrations of sodium chloride (NaCl) on the diffusion rate of chloride ions through a semi-permeable membrane. The data consists of NaCl concentrations (0, 10, 20, 30, 40 mM) and their corresponding diffusion rates (0, 0.2, 0.5, 0.7, 0.8 µmol/min). Which graph type would be most appropriate to visualize the relationship between NaCl concentration and diffusion rate?

Accepted Answer

Line graph

Question 8

Which of the following is an example of an independent variable in a scientific experiment?

Accepted Answer

The dosage of caffeine administered to participants in a reaction time study.

Question 9

In a region where malaria is common, three genotypes occur: AA, AS, and SS. Individuals with AA are more vulnerable to severe malaria, while SS individuals can develop sickle-cell disease. AS individuals generally do not develop severe sickle-cell disease and have increased protection against severe malaria. Which prediction BEST explains why both the A and S alleles can remain in the population over many generations?

Accepted Answer

AS individuals can have greater reproductive success than either AA or SS individuals under conditions where malaria is common, maintaining both alleles in the population.

Question 10

Which of the following is a correct statement about the three domains of life?

Accepted Answer

Bacteria and Archaea are both prokaryotic, while Eukarya includes all eukaryotic organisms.

Question 11

A student collects data on the number of solute molecules that diffuse across a membrane at different time intervals. The data is presented in the following format: time (x-axis) and number of solute molecules that have diffused (y-axis). Which type of graph would be most appropriate for showing how the number of solute molecules changes over time?

Accepted Answer

Line graph

Question 12

Which of the following best describes a scientific hypothesis?

Accepted Answer

A testable explanation for an observation, based on prior knowledge and evidence.

Question 13

Which of the following is an example of a control variable in an experiment?

Accepted Answer

The temperature at which all experimental groups are kept constant.

Question 14

A population of beach mice colonizes a newly formed coastal area with very light-colored sand. The founding population contains mice with genetically determined differences in coat color, ranging from dark brown to very light tan. After many generations, light-colored mice make up most of the population. Which finding would provide the strongest evidence that the change in coat color resulted from natural selection rather than simply from the presence of variation in the original population?

Accepted Answer

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

Question 15

Which of the following best illustrates the concept of interaction as a unifying theme in biology?

Accepted Answer

The mutualistic relationship between bees and flowering plants, where bees pollinate flowers while obtaining nectar.

Question 16

Which of the following best describes the dependent variable in an experiment examining how different levels of pollution affect the number of bird species in a given area?

Accepted Answer

Number of bird species

Question 17

A researcher wants to compare the concentration of a substance in the blood and the dialysate at several time points during a dialysis experiment. Which type of graph would best allow the researcher to compare the concentrations in both solutions across time?

Accepted Answer

Line graph with two lines (one for blood and one for dialysate)

Question 18

Which of the following best explains how natural selection could alter skin pigmentation in a human population migrating to a region with substantially lower year-round UV radiation?

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 19

Which of the following best describes the role of energy and matter as a unifying theme in biology?

Accepted Answer

Living organisms transform energy and cycle matter to sustain life, such as plants converting sunlight into chemical energy through photosynthesis.

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

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