The genetic variability of a population is solely dependent on the generation of mutations
a. True
b. False
Indicate whether the statement is true or false
False
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An increase to 0.5% carbon dioxide in the air (from the normal 0.03%) makes a person breathe 10 times faster. Which alteration in homeostatic conditions in the blood would limit how long a person can hold their breath?
A. Lack of carbon dioxide raises the pH. B. Lack of oxygen raises the pH. C. Buildup of carbon dioxide lowers the pH. D. Buildup of oxygen lowers the pH. E. Buildup of nitrogen raises the pH.
Which is not associated with tularemia?
What will be an ideal response?
When individual cellular slime mold amoebas are near starvation, all the individuals in that immediate area aggregate into a large moving mass of cells called a
A. spore. B. test. C. community. D. colony. E. slug.
Which of the following cells can use nonphagocytic means to kill bacteria?
A) eosinophils B) macrophages C) neutrophils D) natural killer cells E) both eosinophils and neutrophils