Question 1

Which of the following best describes the scientific method as applied in biology?

Accepted Answer

A cyclical process involving observation, hypothesis formation, experimentation, data analysis, and revision of hypotheses.

Question 2

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

Accepted Answer

The application of the new fertilizer.

Question 3

Which of the following is a unifying principle of biology that explains the diversity and unity of life?

Accepted Answer

The theory of evolution by natural selection.

Question 4

A student observes that a certain species of bird has a beak shape that allows it to eat seeds more efficiently than other birds in the same area. This observation is best explained by which biological concept?

Accepted Answer

Natural selection.

Question 5

Which of the following best describes a scientific hypothesis?

Accepted Answer

A tentative explanation that can be tested by experiments or observations.

Question 6

Which equation correctly represents the Hardy-Weinberg equilibrium for a gene with two alleles, $$p$$ and $$q$$?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 7

Which of the following is NOT a characteristic common to all forms of life?

Accepted Answer

Presence of a nucleus.

Question 8

A patient is diagnosed with a genetic disorder caused by a mutation in a single gene. Which of the following best explains how this mutation can affect the patient’s phenotype?

Accepted Answer

The mutation changes the sequence of DNA, which may alter the structure and function of the resulting protein.

Question 9

Which of the following best describes the role of observation and experimentation in the scientific process?

Accepted Answer

They are used to collect data that can support or refute a hypothesis.

Question 10

Which of the following scenarios best illustrates the concept of homeostasis in a living organism?

Accepted Answer

A lizard basking in the sun to raise its body temperature.

Question 11

Which of the following statements about prokaryotic and eukaryotic cells is correct?

Accepted Answer

Only eukaryotic cells have their genetic material enclosed within a nucleus.

Question 12

A researcher is studying the inheritance of a trait controlled by a single gene with two alleles, $$A ($$dominant) and $$a ($$recessive). If two heterozygous individuals ($$Aa) $$mate, what is the expected genotypic ratio of their offspring?

Accepted Answer

1 $$AA$$ : 2 $$Aa$$ : 1 $$aa$$

Question 13

Which of the following best explains why viruses are not considered living organisms?

Accepted Answer

They cannot reproduce independently without a host cell.

Question 14

Which of the following is an example of a scientific theory?

Accepted Answer

The theory of evolution by natural selection.

Question 15

Which of the following best describes the function of DNA in living organisms?

Accepted Answer

DNA stores genetic information that directs the synthesis of proteins.

Question 16

A student is asked to design an experiment to test the effect of temperature on enzyme activity. Which of the following should be the dependent variable?

Accepted Answer

The rate of the enzyme-catalyzed reaction.

Question 17

Which of the following best illustrates the application of the principle of repeatability in scientific experiments?

Accepted Answer

Different scientists obtain similar results when repeating the same experiment under the same conditions.

Question 18

Which of the following is a correct statement about the relationship between structure and function in biology?

Accepted Answer

The structure of a biological molecule or organ determines its function.

Question 19

A population of beetles is exposed to a pesticide. After several generations, most beetles are resistant to the pesticide. Which process best explains this change in the population?

Accepted Answer

Natural selection.

Question 20

Which of the following best describes the impact of scientific discovery on human thought and behavior?

Accepted Answer

Scientific discoveries can change how humans understand the natural world and influence technology, medicine, and policy.

General Biology I (BIOL 1110) Syllabus and Study Guide

Study Guide - Practice Questions

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