Chapter 1 Test What is Biology?

Science is based on certain assumptions, including:

• nature can be understood through systematic study
• scientific ideas are open to revision
• sound scientific ideas can withstand the test of time
• all of the above

An example of a scientific law is the law of

• evolution
• nature
• relativity
• gravity

In order to be useful, a scientific hypothesis must be

• True
• General
• Falsifiable
• Supported by evidence

In a scientific experiment, one variable is hypothesized to affect another variable. The variable that is affected is called the

• Independent Variable
• Experimental Variable
• Dependent Variable
• Sample Variable

Which of the following is not one of the four unifying principles of biology?

• Cell Theory
• Germ Theory
• Homeostasis
• Evolution

Over many generations, living things become better adapted to their environment through the process of

• Symbiosis
• Devleopment
• Natural Selection
• Homeostasis

A structure composed of one or more types of tissues is a(n)

• organ system
• organism
• organ
• cell

All the living things in a given area, together with the nonliving environment, make up a(n)

• Species
• Community
• Ecosystem
• Population

The number of different species alive today is a measure of Earth’s

• biodiversity
• biosphere
• biology
• biome

Which theory best explains why the cells of human beings and chimpanzees share 98 percent of the same genes?

• Cell Theory
• Gene Theory
• Theory of Life
• Theory of Evolution