Exam 1: The Nature of Science and the Characteristics of Life

The term autotroph can be interchanged with the term producer;both terms refer to organisms that obtain energy from the nonliving part of their environment.

A scientist named Dr.Burkholder hypothesized that the dinoflagellate Pfiesteria was associated with the massive die-offs of fish in North Carolina rivers.Subsequent observations supported her hypothesis.Which of the following observations would support that hypothesis?

In the following list,the best evidence for evolution is

The brain is considered an organ because it is constructed from nerve cells.

To survive,living organisms must be able to sense and respond to both their internal and external ________.

Living organisms are intimately connected to the environments in which they live;this connection is called a biome,and a forest is a good example.

New cells are created when existing cells divide;immediately after division,every cell of every known living organism will contain DNA.

Phosphorus is considered to be an essential element for life;if the bacteria found in Mono Lake actually incorporate arsenic into their DNA,this assessment will need to be reevaluated.

Which of the following groups of organisms is NOT included in the domain Eukarya?

Plants and animals need a variety of resources to carry out and maintain life processes;the most important of these resources is ________.

Some bacteria can sense direction using magnetic particles in their cells.

Which of the following organisms might harvest energy from iron,a nonliving part of the environment?

Consider each of the following true statements;which statement supports the theory that all living organisms descended from one common ancestor?

The scientific method cannot be used to evaluate untestable hypotheses.Which of the following types of questions are untestable?

Which of the following statements about the scientific method is true?

When compared with natural systems,a college campus-including its facilities-is most similar to a(n)

The discovery that bacteria living in Mono Lake may have replaced the phosphorus in certain biomolecules with ________ has challenged long-held assumptions about the chemical nature of life.

A group of organisms can develop new characteristics over time through the process of ________.

Scientists can propose testable predictions after first developing a(n)________.

Because polar bears are white,they are difficult to see as they stalk seals;their white fur is an example of an adaptation.