How did Darwin develop his theory of evolution?
A. Experimentation.
B. Observation.
C. Both experimentation and observation.
D. Statistical analysis.
B. Observation.
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What will be accomplished by lowering the activation energy of a reaction?
A. The reaction will proceed more slowly. B. The reaction will reverse. C. The reaction will stop completely. D. The reaction will proceed more quickly.
Antidiuretic hormone (ADH)
A. is secreted by the anterior pituitary gland. B. increases the permeability of the distal convoluted tubules and collecting ducts to water. C. causes the production of a larger quantity of urine. D. causes a less concentrated urine to be produced. E. directly decreases blood volume.
Excessive accumulation of fluid in tissues outside of the blood vessels is called edema. Which of the following scenarios could result in edema?
A) an increase in the concentration of proteins in the blood B) a decrease in the volume of blood in the cardiovascular system C) an alteration of capillary walls so that they are less leaky D) an increase in the pressure of blood flowing through capillaries
The first vertebrates appear in the fossil record during the
A. Cambrian Period. B. Carboniferous Period. C. Triassic Period. D. Devonian Period. E. Proterozoic Era.