Transfers to and from environment reservoirs of
essential elements are __________ rates of exchange
among organisms.
a. much greater than
b. somewhat greater than
c. the same as
d. somewhat slower than
e. far slower than
Answer: e
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The existence of differential drug sensitivity serves to reinforce the idea that
A. many people carry genetic defects. B. each individual is biologically and biochemically unique. C. drugs need to be more closely regulated. D. metabolic blocks are a widespread phenomenon. E. none of these is reinforced.
The following affect membrane fluidity EXCEPT
A. glycoprotein composition. B. cholesterol. C. phospholipid composition. D. the length of the phospholipid fatty acyl tail. E. the relative amounts of phospholipids containing saturated or unsaturated fatty acyl tails.
Stromatolites are ________
a. mineral features in caves that extend downward from the ceiling b. the earliest type of seed plant c. mat-like remains of bacteria found in extinct hydrothermal vents d. dome-shaped, layered structures formed by photosynthetic bacteria
Conservationists prevented the construction of a __________ in order to save endangered
snail darters
a. dam b. highway c. national park d. overpass