The movement of some molecules and ions out of excretory system tubules and back into body fluids is called ____
a. reabsorption
b. excretion
c. filtration
d. secretion
e. diffusion
ANSWER: a
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What will be an ideal response?
A scientist studying a material has determined that 12C, 13C, and 14C occur in the material in a ratio of 1000:10:1. How did he most likely differentiate between these forms of carbon?
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A. summer B. winter C. fall D. early spring E. None of these is correct
You purchase a black dog (B = black, b = brown; B is dominant to b) from a breeder who tells you that the dog is a purebred, and that she will forward its papers to you at a later date
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