Question 1

Which of the following best explains why water is able to moderate Earth's temperature, making life possible?

Accepted Answer

Water has a high specific heat, so it can absorb or release large amounts of heat with only slight temperature changes.

Question 2

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

Accepted Answer

The type of fertilizer used

Question 3

Which property of water allows insects to walk on its surface?

Accepted Answer

Surface tension due to cohesion among water molecules

Question 4

Which of the following is a direct result of the polar covalent bonds in water molecules?

Accepted Answer

Water molecules form hydrogen bonds with each other.

Question 5

A buffer solution is important in biological systems because it:

Accepted Answer

Maintains a stable pH by neutralizing added acids or bases

Question 6

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

Accepted Answer

Individuals with traits best suited to their environment are more likely to survive and reproduce.

Question 7

Which statement about the pH scale is correct?

Accepted Answer

A solution with pH 7 is neutral, while pH values below 7 are acidic.

Question 8

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

Accepted Answer

Ability to photosynthesize

Question 9

Why does ice float on liquid water?

Accepted Answer

Hydrogen bonds in ice create a lattice that makes ice less dense than liquid water.

Question 10

Which of the following best describes a scientific hypothesis?

Accepted Answer

A tentative explanation that can be tested by experiments or observations

Question 11

Which equation correctly represents the relationship between hydrogen ion concentration and pH?

Accepted Answer

$$pH = -\log_{10}[H^+]$$

Question 12

Which functional group is commonly found in amino acids and is responsible for their basic properties?

Accepted Answer

Amino group ($$-NH_2$)

Question 13

Which of the following is a correct statement about carbon atoms?

Accepted Answer

Carbon can form up to four covalent bonds, allowing for diverse molecular structures.

Question 14

Which of the following is an example of a positive control in an experiment testing a new antibiotic's effectiveness?

Accepted Answer

A group of bacteria exposed to a known effective antibiotic

Question 15

Which emergent property of water is most important for the transport of water from roots to leaves in plants?

Accepted Answer

Cohesion and adhesion

Question 16

Which of the following best describes the difference between a theory and a hypothesis in science?

Accepted Answer

A theory is supported by a large body of evidence, while a hypothesis is a testable prediction.

Question 17

Which of the following is a real-world example of feedback regulation in biological systems?

Accepted Answer

The regulation of blood glucose levels by insulin in humans

Question 18

Which of the following best explains why water is called the 'universal solvent'?

Accepted Answer

Water can dissolve a wide variety of substances due to its polarity.

Question 19

Which of the following is a correct application of the scientific method?

Accepted Answer

Formulating a hypothesis after collecting data and then designing an experiment to test it

Question 20

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

Accepted Answer

The three domains are Bacteria, Archaea, and Eukarya.

General Biology: Foundations, Chemistry of Life, and Cell Structure

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