When the amount of water in soil exceeds what the pore space can hold, the soil is
A) at field capacity.
B) at the wilting point.
C) saturated.
D) desiccated.
C
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What is the pattern component of the theory of chemical evolution?
A) Heat and electrical discharges were required for chemical evolution to occur. B) Most chemical evolution occurred at black smokers. C) The process occurred at black smokers, in the atmosphere and oceans, or in outer space. D) Increasingly complex carbon-containing molecules formed early in Earth history.
Cell-mediated immunity is associated with
a. "killer" T cells. b. dendritic cells. c. helper T cells. d. B cells. e. phagocytes.
Which of the following is part of the middle ear?
A. semicircular canals B. pinna C. auditory canal D. malleus E. cochlea
The DNA molecule is replicated _____.
A) to produce an identical molecule B) before a cell divides C) during interphase D) all of the choices