Natural selection is a quick and effective way of eliminating harmful alleles from the population
a. True
b. False
ANSWER: False
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In individuals with normal blood sugar levels, glucose is reabsorbed into the bloodstream in the kidney by members of the GLUT transporter family, which form an aqueous pore across the membrane through which glucose can move passively. As a result, no glucose is excreted in urine. However, in people with untreated diabetes mellitus, blood sugar levels are high and glucose is often present in the
urine. What can explain this occurrence? A. High blood glucose levels reverse the concentration gradient, allowing untransported glucose to be excreted in urine. B. High blood glucose levels interfere with the coupled transport of water and glucose, allowing untransported glucose to be excreted in urine. C. The GLUT transporters become saturated, allowing untransported glucose to be excreted in urine. D. The GLUT transporters cannot hydrolyze ATP quickly enough for ATP to transport the extra glucose, thereby allowing untransported glucose to be excreted in urine.
List as many types of connective tissue as possible, and give their functions
What will be an ideal response?
The major abiotic reservoir for phosphorus is ________
A) the oceans B) the atmosphere C) rock D) dead organic matter
In the Northern Hemisphere, recall that atmospheric CO2 levels are highest in early spring and lowest during early fall. What accounts for this seasonal fluctuation in atmospheric CO2 levels? Select all that apply
A. photosynthesis B. human activities C. respiration D. biomineralization E. plate tectonics