Question 1

Which of the following best describes the process of homeostasis in living organisms?

Accepted Answer

The ability to maintain a stable internal environment despite changes in external conditions.

Question 2

A scientist wants to test the effect of sunlight on plant growth. She sets up two groups: one receives sunlight, the other does not. What is the independent variable in this experiment?

Accepted Answer

Amount of sunlight received by the plants.

Question 3

Which of the following is NOT a property of water that is essential for life?

Accepted Answer

Water molecules are nonpolar and do not form hydrogen bonds.

Question 4

Which statement best explains why ice floats on water?

Accepted Answer

Ice is less dense than liquid water because hydrogen bonds hold water molecules further apart in the solid state.

Question 5

A controlled experiment must include which of the following components?

Accepted Answer

A control group and an experimental group.

Question 6

Which of the following best describes a hypothesis in scientific research?

Accepted Answer

A testable statement based on prior observations and data.

Question 7

Which of the following is an example of a qualitative observation?

Accepted Answer

The leaves of the plant are green.

Question 8

Which kingdom includes organisms that are multicellular, eukaryotic, and capable of photosynthesis?

Accepted Answer

Plantae

Question 9

Which process is described by the equation $$6 \text{CO}_2 + 6 \text{H}_2O \rightarrow \text{C}_6\text{H}_{12}\text{O}_6 + 6 \text{O}_2$$?

Accepted Answer

Photosynthesis

Question 10

Which of the following statements about autotrophs is correct?

Accepted Answer

Autotrophs produce their own food using energy from sunlight or inorganic chemicals.

Question 11

A student claims that water can move up a plant stem against gravity. Which property of water best explains this phenomenon?

Accepted Answer

Adhesion

Question 12

Which of the following best describes sexual reproduction?

Accepted Answer

The fusion of two haploid sex cells to produce genetically unique offspring.

Question 13

Which of the following is a correct statement about scientific theories?

Accepted Answer

They are well-supported explanations that can be tested and revised.

Question 14

Which of the following is NOT a characteristic of living organisms?

Accepted Answer

Ability to reproduce by breaking down chemicals only.

Question 15

Which of the following best describes the difference between independent and dependent variables in an experiment?

Accepted Answer

The independent variable is manipulated by the experimenter, while the dependent variable is measured as the outcome.

Question 16

Which of the following is an example of evolutionary adaptation?

Accepted Answer

A population of insects developing resistance to a pesticide over several generations.

Question 17

Which of the following best explains why water has a high specific heat?

Accepted Answer

It takes a lot of energy to break the hydrogen bonds between water molecules.

Question 18

Which of the following is a correct example of taxonomy?

Accepted Answer

Classifying organisms into domains, kingdoms, phyla, classes, orders, families, genera, and species.

Question 19

Which of the following is a correct statement about prokaryotic cells?

Accepted Answer

They lack a nucleus and membrane-bound organelles.

Question 20

A researcher observes that the surface of water in a glass tube curves upward at the edges. Which property of water is responsible for this observation?

Accepted Answer

Adhesion

General Biology Study Notes: The Science of Life & The Chemical Basis of Life

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