Living members of ____ are often the dominant land plants in cool temperate zones. Among other products, they are
important sources of lumber, paper pulp, resins, and turpentine.
a. lycophytes
b. ferns
c. gymnosperms
d. bryophytes
e. angiosperms
ANSWER: c
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If a population is in Hardy–Weinberg equilibrium and p 5 .6,
(a) q 5 .5. (b) q 5 .4. (c) q 5 .3. (d) q 5 .16.
What assumption is made by researchers when designing experiments to model how life may have arisen on Earth?
a. The chemical reactions of living things are only possible inside living systems. b. Living organisms are composed of elements commonly found on Earth, but absent in the rest of the universe. c. Conditions on Earth have not changed over time. d. Life arose on Earth from non-living matter. e. The development of living cells from nonliving matter was very rapid.
Calcium levels are primarily under the control of
a. calcitonin and thyroxine. b. parathyroid hormone and calcitonin. c. prolactin and oxytocin. d. parathyroid hormone and thyroxine. e. progesterone and ADH.
Fill in the blanks to complete the following statements. ?
___________ are tiny hair-like projections that help expel foreign particles from the respiratory tract.? Fill in the blank(s) with correct word