Question 1

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

Accepted Answer

A single muscle cell can contract, but a whole muscle can generate movement that a single cell cannot.

Question 2

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

Accepted Answer

All individuals must survive and reproduce equally.

Question 3

A scientist is testing the effect of different fertilizer types on plant growth. She keeps the amount of sunlight, water, and soil type the same for all plants. What are sunlight, water, and soil type in this experiment?

Accepted Answer

Control variables

Question 4

Which of the following best describes the relationship between the three domains of life?

Accepted Answer

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

Question 5

In the context of heart disease, which level of biological organization is directly affected by the buildup of cholesterol plaques in arteries?

Accepted Answer

Tissue

Question 6

A researcher observes that individuals with the AS genotype for hemoglobin have higher survival rates in malaria-endemic regions than those with AA or SS genotypes. Which concept does this observation best illustrate?

Accepted Answer

Differential reproductive success

Question 7

Which of the following is the best definition of a scientific hypothesis?

Accepted Answer

A testable explanation for an observation or phenomenon.

Question 8

A scientist wants to test whether a new drug lowers blood pressure. She gives the drug to one group and a placebo to another, measuring blood pressure before and after treatment. What is the dependent variable?

Accepted Answer

Blood pressure

Question 9

Which of the following best describes why a line graph is most appropriate for displaying the change in solute concentration in blood over time during dialysis?

Accepted Answer

It shows how a continuous variable changes over another continuous variable.

Question 10

Which scenario best demonstrates the concept of an ecosystem?

Accepted Answer

Interactions among fish, aquatic plants, water chemistry, and temperature in a lake.

Question 11

A population of insects is exposed to a new pesticide. After several generations, most individuals are resistant. Which condition would indicate that resistance evolved by natural selection?

Accepted Answer

Resistant individuals survive and reproduce more than non-resistant individuals.

Question 12

Which of the following is an example of an emergent property at the tissue level?

Accepted Answer

Coordinated contraction of cardiac muscle tissue enables the heart to pump blood.

Question 13

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

Accepted Answer

Heterozygotes (AS) have a survival advantage, maintaining both alleles in the population.

Question 14

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

Accepted Answer

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

Question 15

A researcher is studying the effect of temperature on enzyme activity. She measures enzyme activity at 10°C, 20°C, 30°C, and 40°C. Which type of graph would best display her results?

Accepted Answer

Line graph

Question 16

Which of the following best describes the role of a control group in an experiment?

Accepted Answer

It establishes a baseline to compare the effects of the independent variable.

Question 17

In the evolution of lactase persistence, which observation is most critical to support natural selection as the cause for increased frequency of lactase-persistence alleles?

Accepted Answer

Lactase-persistence variants are inherited, and individuals carrying them produced more surviving offspring under dairying conditions.

Question 18

A scientist collects data on the number of bacteria colonies at different antibiotic concentrations. Which variable is the independent variable?

Accepted Answer

Antibiotic concentration

Question 19

Which of the following best describes the process of science?

Accepted Answer

It involves making observations, forming hypotheses, testing predictions, analyzing data, and drawing conclusions.

Question 20

A population of birds migrates to a region with lower UV radiation. Over generations, the population's average skin pigmentation becomes lighter. Which sequence best explains this change?

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.

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

Study Guide - Practice Questions

Study Guide - Flashcards