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A localized group of organisms that belong to the same species is called a:
A) biosystem.
B) community.
C) population.
D) ecosystem.
E) family.

C) population.

Organisms interact with their environments, exchanging matter and energy. For example, plant chloroplasts convert the energy of sunlight into:
A) the energy of motion.
B) carbon dioxide and water.
C) the potential energy of chemical bonds.
D) oxygen.
E) kinetic energy.

C) the potential energy of chemical bonds.

The main source of energy for producers in an ecosystem is:
A) light energy.
B) kinetic energy.
C) thermal energy.
D) chemical energy.

A) light energy.

Which of the following types of cells utilize deoxyribonucleic acid (DNA) as their genetic material but do not have their DNA encased within a nuclear envelope?
A) animal
B) plant
C) archaea
D) fungi
E) protists

C) archaea

To understand the chemical basis of inheritance, we must understand the molecular structure of DNA. This is an example of the application of which concept to the study of biology?
A) evolution
B) emergent properties
C) reductionism
D) the cell theory
E) feedback regulation

C) reductionism

Once labor begins in childbirth, contractions increase in intensity and frequency until delivery. The increasing labor contractions of childbirth are an example of which type of regulation?
A) a bioinformatic system
B) positive feedback
C) negative feedback
D) feedback inhibition
E) enzymatic catalysis

B) positive feedback

When the body's blood glucose level rises, the pancreas secretes insulin and, as a result, the blood glucose level declines. When the blood glucose level is low, the pancreas secretes glucagon and, as a result, the blood glucose level rises. Such regulation of the blood glucose level is the result of:
A) catalytic feedback.
B) positive feedback.
C) negative feedback.
D) bioinformatic regulation.
E) protein-protein interactions.

C) negative feedback.

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