Question 1

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

Accepted Answer

A theory is broader in scope and supported by a large body of evidence, while a hypothesis is a specific, testable statement.

Question 2

In the scientific method, why is it important to change only one variable at a time during an experiment?

Accepted Answer

To ensure that the results are due to the variable being tested and not confounded by other factors.

Question 3

Which of the following is an example of pseudoscience?

Accepted Answer

Claiming that vaccines cause autism without scientific evidence.

Question 4

A researcher wants to test the hypothesis: 'If fertilizer is added to tomato plants, then the plants receiving the fertilizer will produce more tomatoes.' What is the independent variable in this experiment?

Accepted Answer

The addition of fertilizer.

Question 5

Which of the following is NOT a property of life?

Accepted Answer

Ability to remain unchanged over generations.

Question 6

Which domain includes organisms with membrane-bound organelles and a nucleus?

Accepted Answer

Eukarya

Question 7

In a controlled experiment, what is the purpose of having a control group?

Accepted Answer

To provide a baseline for comparison with the experimental group.

Question 8

Which reasoning process is used when forming a general conclusion from specific observations?

Accepted Answer

Inductive reasoning

Question 9

Which of the following best explains why replication is important in scientific experiments?

Accepted Answer

It increases the reliability and validity of the results.

Question 10

Which of the following is a correct sequence of levels in the biological hierarchy from smallest to largest?

Accepted Answer

Molecules, organelles, cells, tissues, organs, organisms, populations, communities, ecosystems, biosphere

Question 11

Which of the following statements about evolution is supported by scientific evidence?

Accepted Answer

All living organisms are modified descendants of common ancestors.

Question 12

Which of the following is the correct formula for the process of photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O + light \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 13

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

Accepted Answer

DNA encodes information for building the molecules synthesized within the cell.

Question 14

A population of mice living on light-colored sand has both light and dark coat color variants. After several generations, most mice have light coats. Which process best explains this change?

Accepted Answer

Natural selection

Question 15

Which of the following is a characteristic of prokaryotic cells?

Accepted Answer

They lack membrane-enclosed organelles.

Question 16

Which of the following is an example of deductive reasoning in science?

Accepted Answer

Starting with the general principle that all living things have cells and predicting that a newly discovered organism will have cells.

Question 17

Which of the following is the main reason why nothing is ever 'proven' in science?

Accepted Answer

Experiments can only support or fail to support a hypothesis, but new evidence may change conclusions.

Question 18

Which of the following best illustrates the relationship between structure and function in biology?

Accepted Answer

The shape of red blood cells allows them to efficiently carry oxygen.

Question 19

Which of the following is a unifying theme in biology?

Accepted Answer

Organization, information, energy and matter, interactions, and evolution.

Themes in the Study of Life: Introduction to General Biology

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