Question 1

Which of the following is NOT a characteristic of life as defined in biology?

Accepted Answer

Inability to reproduce

Question 2

Which level of biological organization is directly above 'cell' in the hierarchy?

Accepted Answer

Tissue

Question 3

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

Accepted Answer

Application of fertilizer

Question 4

Which statement best explains how the theory of evolution accounts for the unity and diversity of life?

Accepted Answer

Descent from a common ancestor leads to shared traits, while adaptation to different environments leads to diversity.

Question 5

In a pond ecosystem, which organism would be considered a producer?

Accepted Answer

Algae

Question 6

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

Accepted Answer

A testable explanation for an observation

Question 7

Which of the following chemical bonds is the strongest in biological molecules?

Accepted Answer

Covalent bond

Question 8

Water is essential to life due to its unique properties. Which property allows water to moderate Earth's climate?

Accepted Answer

High specific heat capacity

Question 9

Which equation represents the dissociation of a weak acid in water?

Accepted Answer

$$\mathrm{HA} \rightarrow \mathrm{H}^+ + \mathrm{A}^-$$

Question 10

A buffer system in blood helps maintain pH by using the following equilibrium: $$\mathrm{H}_2\mathrm{CO}_3 \rightleftharpoons \mathrm{HCO}_3^- + \mathrm{H}^+. $$What happens when excess acid is added to the blood?

Accepted Answer

The equilibrium shifts to produce more $$\mathrm{H}_2\mathrm{CO}_3$$

Question 11

Which functional group is most likely to make a molecule behave as a base?

Accepted Answer

Amino group ($$-\mathrm{NH}_2)$$

Question 12

Which of the following best describes the role of experimental design in the scientific method?

Accepted Answer

It provides a systematic way to test predictions and control variables.

Question 13

Which of the following organic molecules is primarily responsible for storing genetic information?

Accepted Answer

Nucleic acids

Question 14

Which of the following is a real-world example of a consumer in a biological community?

Accepted Answer

Cow eating grass

Question 15

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

Accepted Answer

Cohesion due to hydrogen bonding

Question 16

Which of the following best explains why carbon is the backbone of organic molecules?

Accepted Answer

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

Question 17

A patient has a blood pH of 7.1. Which buffer system is most likely involved in restoring normal pH?

Accepted Answer

Bicarbonate buffer system

Question 18

Which of the following is an example of descent with modification?

Accepted Answer

A population of finches develops different beak shapes to exploit different food sources.

Question 19

Which equation best represents the formation of a peptide bond between two amino acids?

Accepted Answer

$$\mathrm{Amino\ acid}_1 + \mathrm{Amino\ acid}_2 \rightarrow \mathrm{Dipeptide} + \mathrm{H}_2\mathrm{O}$$

Question 20

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

Accepted Answer

Formulating a hypothesis, designing an experiment, collecting data, and drawing conclusions

Foundations of General Biology: Life, Evolution, Chemistry, and Scientific Inquiry

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