A salt is a compound in which the hydrogen ion of ____ is replaced by some other cation
a. water
b. a base
c. an acid
d. an anion
e. a hydroxide ion
c
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Coxiella burnetii is responsible for ________.
A. Typhoid fever B. Q-fever C. Rocky Mountain spotted fever D. Lyme disease
In Engelmann's classic experiment, why were the oxygen-requiring bacteria clustered around the regions of Spirogyra algae that were bathed in red, blue, and violet light?
a. Chlorophyll is green and thus reflects green light. b. The bacteria were immobile and that is where Engelmann happened to place them. c. Photosynthesis is most active in those wavelengths of light and thus more oxygen is consumed by the algae in those regions. d. Photosynthesis is most active in those wavelengths of light and thus more oxygen is produced by the algae in those regions. e. The most energy-rich wavelengths of light are found at the edges of visible and nonvisible light (ultra violet and infrared).
The ____, labeled as ____ in the accompanying diagram, is a channel for urine to flow from the kidney to the urinary
bladder.
a. urethra; B b. urethra; D c. ureter; D d. ureter; B e. ureter; C
Males tend to be affected in greater numbers by X-linked recessive genetic disorders than are females because
a. females have two dominant genes for the disorder. b. males have only one X chromosome. c. males have a double dose of the gene. d. Y chromosomes are not as strong as X chromosomes. e. females have only one X chromosome.