Why are plants a good source of potential drug compounds?
A. because natural products are much more effective than synthetic products
B. because it is far cheaper to grow chemical compounds in a plant than it is to synthesize them in the laboratory
C. because there are thousands of different plants with thousands of different chemicals in them
D. all of the above
E. none of the above
Answer: C
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Indicate whether the statement is true or false
A key obstacle to declining birth rates is
A) religious opposition to some birth control methods. B) economic incentives in favor of smaller families. C) women attending school in greater numbers. D) increased health care leading to decreased infant mortality. E) increased distribution of contraceptives.
One of the last cases of Native American resistance to European settlement occurred in the late 19th century when ________
Fill in the blank(s) with correct word
Ecotones are the ________
A) interactive behaviors leading to communication B) sounds that animal communities make in ecosystems C) studies of specific biomes by ecologists D) areas between territories of organisms E) transitional zones between ecosystems