Relative humidity is the
A) amount of pressure at a given temperature at which water transforms from a liquid to a gaseous state.
B) amount of pressure that water vapor exerts independent of the pressure of dry air.
C) temperature at which saturation vapor pressure is achieved.
D) amount of water vapor in the air relative to the saturation vapor pressure.
D
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Which animal is a chordate?
(a) sea star. (b) sea cucumber. (c) acorn worm. (d) lancelet.
Mannose sugar occurs on the surface of some bacteria and fungi and can trigger the
A. release of cytotoxins by NK cells. B. release of histamines by basophils. C. classical pathway of complement activation. D. lectin pathway of complement activation. E. release of NETs by neutrophils.
The DNA sequence of two alleles of the same gene can differ by
A) approximately 100 continuous base pairs. B) approximately 100 base pairs scattered throughout the gene. C) three base pairs (one coding triplet). D) one base pair. E) no base pairs; allele sequences can be identical.
Reduced quantity of red blood cells results in ____.
A. ventricular fibrillation B. hypertension C. leukemia D. anemia E. a stroke