Humans routinely take natural areas and change the environment to suit their needs (such as clear-cutting forests or building dams). This is an example of _______.
a) overharvesting
b) climate change
c) exotic species
d) habitat loss
Ans: d) habitat loss
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The enzyme-linked virus-inducible system (ELVIS) uses a cloned -galactosidase gene that is expressed only when cells are infected with what virus?
a. RSV b. Human immunodeficiency virus (HIV) c. HSV d. Cytomegalovirus (CMA)
Plant tissues are more than 90 percent ____ by weight
a. carbohydrates b. water c. carbon d. nitrogen e. cellulose
The calcium-rich remains of protists are now found
a. in sea floor sediments. b. in limestone rock formations. c. in the white cliffs of Dover, England. d. in the Egyptian pyramids. e. in all of these places.
The Law of Thermodynamics that states that increases in entropy are favored is the
A. Fourth Law of Thermodynamics. B. Second Law of Thermodynamics. C. Third Law of Thermodynamics. D. First Law of Thermodynamics.