What is a benign tumor?
A. fluids that travel to other locations
B. a mass of cells that invades other tissues
C. a fluid-filled sac under the skin
D. a mass of cells that remains in one area
Answer: D. a mass of cells that remains in one area
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Of the following list, which two factors are the main sources of differences among humans? 1. genetic variation 2. behavioral differences 3. differences in metabolism 4. environmental differences
A. 1 & 2 B. 1 & 4 C. 2 & 4 D. 3 & 1
A doctor is treating a patient who has some form of anemia. First, the doctor tries to give the patient extra vitamins that contain iron, to no effect. There is no evidence of lead poisoning
The doctor tries an injection of vitamin B12, and the anemia is under control. What type of anemia did the patient have? A) iron-deficiency anemia B) sickle-cell anemia C) pernicious anemia D) hemorrhagic anemia
According to the equation for population growth rate, if two populations have the same death rates, then the population with r = 2 will increase more rapidly than a population with r = 4
Indicate whether the statement is true or false
In the reaction, 6CO2 + 6H2O ?C6H12O6 + 6O2, which side should energy be placed on?
A. the right side; this is an endergonic reaction. B. neither side; the reaction is in equilibrium. C. the right side; this is an exergonic reaction. D. the left side; this is an exergonic reaction. E. the left side; this is an endergonic reaction.