Exam 1: Humans in the World of Biology

How does a population differ from an ecosystem?

A(n) ________ involves drug testing on humans.

A(n) ________ group is treated like an experimental group, except for the one variable being tested.

During phase I clinical trials, a new drug is tested ________.

"An athlete who uses dietary supplements will perform better than one who doesn't." This statement would be an example of which of the following?

The term ________ variable refers to one of two variables involved in an experiment, in which neither variable can be isolated as having an effect.

Which of the following levels of organization would a single-celled organism be excluded from?

The domain Eukarya has ________ kingdoms.

A(n) ________ is all of the species in an ecosystem that can interact in a geographic area.

A(n) ________ is a substance that appears to be identical to a drug being tested but has no known effect on the condition being studied.

A study shows that people who eat fish three times a week live longer. Based on this study, which of the following can you not conclude?

Traits that enable an organism to survive and reproduce in its natural environment are called ________.

All individuals of a species that can interbreed in an area are called a(n) ________.

It is notoriously difficult to perform unbiased studies when human subjects are used. When governmental agencies such as the U.S. Food and Drug Administration (FDA) are trying to determine the validity of scientific claims, they very closely examine the methods used in the experiments. What are the three phases of clinical trial, and which one(s) must a drug pass in order to be sold in U.S. markets?

How can you test the following statement using the scientific methodology? "Exam performance improves as the amount of sleep obtained the night before an exam increases."

Which of the following types of organisms are not composed of eukaryotic cells?

Explain how the destruction of the original tropical forests will affect the development of new medicines.

Researchers testing new drugs usually give the drug to one group of people and give placebos, "sugar pills," to another group. The group receiving the placebo ________.

If an object were collected on Mars by the rover Curiosity, it would be considered a living organism if it ________.

Which of the following is not a characteristic of all living things?