Question 1

Which of the following best describes the relationship between structure and function in biological systems?

Accepted Answer

At each level of the biological hierarchy, analyzing structure gives clues about function, and knowing function provides insight into structure.

Question 2

Which of the following is NOT a correct statement about the cell theory?

Accepted Answer

Only multicellular organisms are composed of cells.

Question 3

A scientist is testing the antimicrobial effects of a plant extract using a disk diffusion method against $$E. coli. $$Which variable is the independent variable in this experiment?

Accepted Answer

The type or concentration of plant extract applied to the disk.

Question 4

Which of the following is a correct example of negative feedback regulation in the human body?

Accepted Answer

High blood glucose stimulates insulin secretion, which lowers blood glucose, reducing further insulin secretion.

Question 5

Which of the following statements correctly distinguishes prokaryotic and eukaryotic cells?

Accepted Answer

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells possess both.

Question 6

A student collects data on the heights of plants grown under different light conditions. The data are recorded as numbers in centimeters. What type of data is this?

Accepted Answer

Quantitative data

Question 7

Which of the following best describes a scientific theory?

Accepted Answer

A theory is broader in scope than a hypothesis and is supported by a large body of evidence.

Question 8

In a controlled experiment, why is it important to have a control group?

Accepted Answer

To compare the effects of the independent variable against a baseline where the variable is not manipulated.

Question 9

Which of the following is an example of inductive reasoning in biology?

Accepted Answer

Deriving a generalization from a large number of specific observations.

Question 10

A researcher observes that a desk lamp does not work. She hypothesizes that the bulb is burnt out. What is the next logical step in the scientific method?

Accepted Answer

Test the prediction by replacing the bulb.

Question 11

Which of the following best explains why scientific papers undergo peer review before publication?

Accepted Answer

To allow colleagues to evaluate and validate the research methods and findings.

Question 12

Which of the following is a real-world example of how science and technology are interdependent?

Accepted Answer

The discovery of DNA structure led to advances in DNA technology, such as testing for hereditary diseases.

Question 13

Which of the following is the correct order of biological organization from largest to smallest?

Accepted Answer

Biosphere, ecosystems, communities, populations, organisms, organs, tissues, organelles, molecules

Question 14

A scientist forms a hypothesis that a certain plant extract will inhibit bacterial growth. After testing, no inhibition is observed. What should the scientist do next according to the scientific method?

Accepted Answer

Refine the experiment and test for possible contamination or other variables.

Question 15

Which of the following is an example of positive feedback regulation?

Accepted Answer

Blood clotting, where the presence of platelets attracts more platelets to the site of injury.

Question 16

Which of the following statements about scientific inquiry is correct?

Accepted Answer

Scientific inquiry is flexible and may require backtracking or refinement of hypotheses.

Question 17

Which of the following is a feature of eukaryotic cells but NOT prokaryotic cells?

Accepted Answer

Membrane-enclosed organelles

Question 18

A biologist uses the fruit fly $$Drosophila melanogaster as a $$model organism. Why are model organisms important in biological research?

Accepted Answer

They allow scientists to study biological mechanisms that are often conserved across species.

Question 19

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

Accepted Answer

A theory is a well-substantiated explanation that can generate new hypotheses, while a hypothesis is a testable explanation based on observations.

Chapter 1: Evolution, Themes of Biology, and Scientific Inquiry – Study Notes

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