Chapter 1

Which statement about the properties of life is false?

• Organisms have the ability to take in energy and use it.

• Organisms have the ability to respond to stimuli from the environment

• Organisms have the ability to reproduce

• Organisms have an unchanging, constant internal environment

Life is organized in a hierarchial fashion. Which sequence correctly lists the hierarch from leat to most inclusive?

• cell, molecule, organ system, organ, organelle, population, tissue, organism, ecosystem, community

• molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem

• ecosystem, population, organ system, cell, community, molecule, organ, organism, organelle, tissue

• molecule, cell, organism, organ system, tissue, population, organ, organelle, community, ecosystem

The tree in your backyard is home to two cardinals, a colony of ants, a wasp's nest, two squirrels, and millions of bacteria. Together, all of these organisms represent a(n)

• community.

• species.

• ecosystem.

• population.

If you eat a hamburger, you are mainly eating ground-up beef muscle. What levels of organization are represented in this ground-up muscle?

• organelle, cell, and tissue

• organ, organ system, and organism

• tissue, organ, and organ system

• organism, population, and community

Which statement about bacteria is true?

• Bacteria do not use the same genetic code as organisms in other domains.

• Bacteria are in a domain of their own.

• Archaea belong to the same domain.

• All bacteria are multicellular organisms.

Members of the kingdom Animalia

• can obtain their food by eating other organisms.

• can obtain their food either by absorption or by photosynthesis.

• make their own food through photosynthesis.

A hypothesis is

• a proposed explanation for a set of observations.

• an explanatory idea that is broad in scope and supported by a large body of evidence.

• a widely accepted idea about a phenomenon.

• the same as a theory.

You notice that over the past month, many students on campus have started wearing a new style of school sweatshirt. You think to yourself that perhaps the bookstore has recently started selling this new sweatshirt style. This is an example of a(n)

• experimental question.

• hypothesis.

• type of observation.

• experiment.

A theory is a(n)

• concept in the early stages that still needs to be tested.

• description of a belief that invokes the supernatural.

• idea that has been proven.

• explanation of an idea that is broad in scope and supported by a large body of evidence.

A scientist performs a controlled experiment. This means that

• the experiment proceeds at a slow pace to guarantee that the scientist can carefully observe all reactions and process all experimental data.

• one experiment is performed, but the scientist controls the variables.

• two versions of the experiment are conducted, one differing from the other by only a single variable.

• the experiment is repeated many times to ensure that the results are accurate.