Exam 1: Humans in the World of Biology

List and briefly explain the organization of life beginning at the molecular level and continuing through the biosphere.

The term ________ variable describes when two variables are involved and neither variable can be isolated as having an effect in an experiment.

Match each definition in the first column to the correct term in the second column. -A testable explanation for an observation.

Fill-in-the-Blank Questions -________ are traits that enable an organism to survive and reproduce in its natural environment.

A particular virus consists of only DNA and proteins.Viruses attach to the surface of a host cell and inject the viral DNA into the host.The host cell then copies the viral DNA and makes new viruses.Eventually,the host cell is killed,and the new viruses are released.These new viruses search for new hosts to continue the cycle.Use at least three characteristics of life to justify whether a virus is a living thing.

Fill-in-the-Blank Questions -A community and its physical environment are often referred to as a(n)________.

A population differs from an ecosystem because ________.

Match each definition in the first column to the correct term in the second column. -The collection of all chemical reactions that occur in a cell.

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

Fill-in-the-Blank Questions -The smallest functional unit of life is known as a(n)________.

A statement such as "If human body temperature increases to a certain level,then critical proteins will be denatured" would most likely be associated with ________.

Fill-in-the-Blank Questions -________ is the ability to maintain a relatively constant internal environment.

Members of the domains Bacteria and Archaea that lack a nucleus and internal compartments are considered which of the following?

The pH of soda is fairly acidic.Even after you drink several sodas,the pH of your blood will not fluctuate much.This is an example of your body's ability to ________.

Living organisms are members of all of the levels listed; however,rocks are components of ________.

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

Match each definition in the first column to the correct term in the second column. -A document that lists all potential negative effects of participation in a study.

Fill-in-the-Blank Questions -A(n)________ involves drug testing on humans.

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 are trying to determine the validity of scientific claims,they very closely examine the methods used in the experiments.Name two things that would be important in evaluating how the studies were performed.

Match each definition in the first column to the correct term in the second column. -A genetic trait that helps an organism survive and reproduce in its environment.