Campbell Biology Concepts & Connections

Martha R. Taylor, Jean L. Dickey, Eric J. Simon, Kelly Hogan, Jane B. Reece

Chapter 1

Biology: Exploring Life - all with Video Answers

Educators

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Chapter Questions

Problem 1

Complete the following map organizing one of biology's major themes.

James Kiss

James Kiss

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Problem 2

All the organisms on your campus make up
a. an ecosystem.
b. a community.
c. a population.
d. the biosphere.

Bryan Lynn

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Problem 3

Which of these is not a property of all living organisms?
a. capable of reproduction
b. uses energy
c. composed of multiple cells
d. responds to the environment

Christina Sorrentino

Christina Sorrentino

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Problem 4

Which of the following statements best distinguishes hypotheses from theories in science?
a. Theories are hypotheses that have been proven.
b. Hypotheses usually are narrow in scope; theories have broad explanatory power.
c. Hypotheses are tentative guesses; theories are correct answers to questions about nature.
d. Hypotheses and theories are different terms for essentially the same thing in science.

James Kiss

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Problem 5

Which of the following best demonstrates the unity among all living organisms?
a. structure correlated with function
b. DNA and a common genetic code
c. emergent properties
d. natural selection

Ashton Cook

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Problem 6

A controlled experiment is one that
a. proceeds slowly enough that a scientist can make careful records of the results.
b. keeps all variables constant.
c. is repeated many times to make sure the results are accurate.
d. tests experimental and control groups in parallel.

Morgan Thompson

Morgan Thompson

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Problem 7

Which of the following is a true statement of observational data?
a. It is always qualitative, not quantitative.
b. It is used to form hypotheses, but not to test them.
c. It can include comparisons of fossils as well as DNA sequences.
d. It is the type of data used for the independent variable in a controlled experiment.

Jade Schlamb

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Problem 8

A biologist studying interactions among the bacteria in an ecosystem could not be working at which level in life's hierarchy? (Choose carefully and explain your answer.)
a. the population level
b. the molecular level
c. the organism level
d. the organ level

Noah Boudrie

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Problem 9

Which of the following best describes the logic of scientific inquiry?
a. If I generate a testable hypothesis, my experiments will support it.
b. If my prediction is correct, it will lead to a testable hypothesis.
c. If my observations are accurate, they will support my hypothesis.
d. If my hypothesis is correct, I can expect certain test results.

Prashant Bana

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Problem 10

In an ecosystem, how is the flow of energy similar to that of matter, and how is it different?

Eric Goldman

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Problem 11

Explain the role of heritable variations in Darwin's theory of natural selection.

Eric Goldman

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Problem 12

Describe the process of scientific inquiry and explain why it is not a rigid method.

Eric Goldman

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Problem 13

Contrast technology with science. Give an example of each to illustrate the difference.

Eric Goldman

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Problem 14

Biology can be described as having both a vertical scale and a horizontal scale. Explain what that means.

Eric Goldman

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Problem 15

Explain what is meant by this statement: Natural selection is an editing mechanism rather than a creative process.

Eric Goldman

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Problem 16

The graph below shows the results of an experiment in which mice learned to run through a maze.
a. State the hypothesis and prediction that you think this experiment tested.
b. Which was the control group and which the experimental? Why was a control group needed?
c. List some variables that must have been controlled so as not to affect the results.
d. Do the data support the hypothesis? Explain.

Priya Manhas

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Problem 17

Suppose that in an experiment similar to the camouflage experiment described in Module $1.5,$ a researcher observed and recorded more total predator attacks on dark-model mice in the inland habitat than on dark models in the beach habitat. From comparing these two pieces of data, the researcher concluded that the camouflage hypothesis is false. Do you think this conclusion is justified? Why or why not?

Eric Goldman

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Problem 18

The fruits of wild species of tomato are tiny compared with the giant beefsteak tomatoes available today. This difference in fruit size is almost entirely due to the larger number of cells in the domesticated fruits. Plant biologists have recently discovered genes that are responsible for controlling cell division in tomatoes. Why would such a discovery be important to producers of other kinds of fruits and vegetables? To the study of human development and disease? To our basic understanding of biology?

Prashant Bana

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Problem 19

The news media and popular magazines frequently report stories that are connected to biology. In the next 24 hours, record the ones you hear or read about in three different sources and briefly describe the biological connections in each story.

Patsy Naomi

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