The study of the distribution of animals and plants around the world is
a. diversity.
b. biogeography.
c. ecology.
d. natural history.
e. environmentalism.
Answer: b
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Kuru is a degenerative disease of the central nervous system believed to be caused by which type of agent?
A) virus B) bacterium C) prion D) viroid E) protozoan
The ____ horizon is the most fertile soil layer where the roots of most herbaceous plants are located?
a. A b. B c. C d. D e. O
An important functional role of the endocrine system is to ____
a. respond rapidly to changes in the body b. control gene action c. inhibit nervous system action on muscles and glands d. regulate digestion e. fight infection
Which of the following statements is TRUE with regard to Entamoeba histolytica?
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