Provisioning services ____
a. are critical functions that preserve and recycle resources upon which ecosystems depend
b. transfer CO2 to a nutrient compartment in the biosphere
c. enable populations to function within their food webs
d. describe the availability of plants, animals, and other materials useful to all organisms
e. involves planting crops for use by many organisms
ANSWER: d
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The purity of illicit drugs varies, so
a) drugs should be tested to ensure purity. b) some drugs may not harm the fetus. c) drug users can never be sure what they are ingesting. d) they do not pose risks to the fetus.
In the neritic zone, a 10-milliliter sample of surface water can contain ____ of multicellular planktonic organisms
a. hundreds b. thousands c. millions d. billions e. trillions
In the mammalian biological clock, the “master clock” is located in the pineal gland
____________________ Indicate whether the statement is true or false.
In which population would it be least likely that an accident would significantly alter the frequency of the brown allele?
A) Population A. B) Population B. C) Population C. D) They are all the same. E) It is impossible to tell from the information given.