Organic macromolecules may have formed by ____
a. addition of water to small organic subunits to facilitates enzymatic synthesis reactions
b. dehydration synthesis reactions that combined smaller subunits into larger molecules
c. increasing availability of inorganic compounds
d. sequestration inside a semi-permeable membrane
e. spontaneous aggregation of the different organic compounds in the atmosphere
ANSWER: b
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Sking and answering questions about the world in an unbiased manner is referred to as ____
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Recall that sedimentary rocks, living organisms, oceans, and soil are all carbon reservoirs. If the carbon in each of these reservoirs was instantly transformed into atmospheric CO2, which reservoir would contribute the most CO2 to the atmosphere?
A. sedimentary rocks B. living organisms C. oceans D. soil
A spider's chelicerae _____
a. detect light c. produce silk b. inject venom d. eliminate excess water
Biological magnification refers to the
a. increase in size of animals as they progress through a food chain. b. increase in size of organisms as they progress through ecological succession. c. increase in the efficiency of energy utilization as organisms progress through a food chain. d. accumulation of toxic pollutants as animals pass through a food chain. e. growth of organ size within organisms.