Substances called ________ donate hydrogen ions as they dissolve in water, lowering the pH of the solution
a. acids
b. bases
c. solvents
d. salts
a
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For water fleas of the genus Daphnia, switching from a pattern of asexual reproduction to sexual reproduction coincides with _____
A) environmental conditions becoming more favorable for offspring B) greater abundance of food resources for offspring C) periods of temperature or food stresses on adults D) completion of puberty E) exhaustion of an individual's supply of eggs
Decontaminating and disinfecting surfaces may result in a decreased removal of contaminating organisms when used in combination. This is due to the fact that:
a. agents are all synergistic and should not be of concern in the laboratory. b. agents mixed together may actually inac-tivate each other or create harmful chem-icals resulting in additional hazards. c. agents are antagonistic and will not be as effective. d. agents are already premixed to maximize sterilization.
In vertebrates, the CNS consists of the
a. brain and spinal cord. b. brain and gray matter. c. spinal cord and gray matter. d. brain and reflexes. e. spinal cord and nerves.
During inflammation, blood vessels are constricted to prevent leakage.
Answer the following statement true (T) or false (F)