Question 1

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

Accepted Answer

A single neuron can transmit electrical signals, but a network of neurons can process complex information and generate behavior.

Question 2

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

Accepted Answer

Gravity

Question 3

A scientist is studying the effect of temperature on the rate of enzyme activity. She measures enzyme activity at 10°C, 20°C, 30°C, and 40°C. Which variable is the independent variable in this experiment?

Accepted Answer

Temperature

Question 4

Which of the following best describes why sickle cell anemia persists in populations where malaria is common?

Accepted Answer

Individuals with one sickle cell allele (AS genotype) have increased survival against malaria, maintaining both alleles in the population.

Question 5

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 6

A researcher is testing the effect of a new drug on blood pressure. The group receiving a placebo serves as which type of variable?

Accepted Answer

Negative control

Question 7

Which of the following best explains why light-colored beach mice became more common in a population living on light sand?

Accepted Answer

Light-colored mice were less visible to predators, survived longer, and produced more offspring, increasing the frequency of light coloration alleles.

Question 8

Which domain of life includes organisms that have membrane-bound organelles and a nucleus?

Accepted Answer

Eukarya

Question 9

A scientist hypothesizes that increased UV exposure leads to darker skin pigmentation in a population over generations. Which of the following is a key component of a scientific hypothesis?

Accepted Answer

It must be testable and falsifiable.

Question 10

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

Accepted Answer

They are kept constant to ensure that the effect of the independent variable can be measured accurately.

Question 11

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 12

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

Accepted Answer

A plant's roots absorb water and minerals from the soil, while its leaves exchange gases with the atmosphere.

Question 13

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

Accepted Answer

Line graph

Question 14

Which of the following best describes why lactase persistence increased in populations with a history of cattle domestication?

Accepted Answer

Individuals with lactase-persistence alleles could digest milk and had greater reproductive success, increasing the frequency of these alleles.

Question 15

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

Accepted Answer

The growth rate of plants measured after fertilizer application

Question 16

A population of fish is exposed to increasing levels of water pollution. Over several generations, only fish with a genetic mutation that allows them to detoxify pollutants survive and reproduce. Which process is primarily responsible for the increase in frequency of the detoxifying mutation?

Accepted Answer

Natural selection

Question 17

Which of the following best describes an emergent property at the tissue level?

Accepted Answer

Muscle tissue can contract to produce movement, a property not found in individual muscle cells alone.

Question 18

A scientist wants to compare the average amount of potassium ions that diffuse through a membrane at different temperatures (5°C, 15°C, 25°C, 35°C, 45°C). Which type of graph would be most appropriate?

Accepted Answer

Line graph

Question 19

Which of the following is a correct statement about the process of science?

Accepted Answer

It involves making observations, forming hypotheses, testing predictions, and revising hypotheses based on evidence.

Question 20

In a coastal region, declining fish populations reduce the availability of omega-3–rich seafood for humans, and increased competition among remaining fish species alters predator–prey relationships. Which level of biological organization is primarily affected?

Accepted Answer

Ecosystem

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

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