Osteoporosis is a condition in which the density of bones is decreased so much that the individual is at a higher risk of fractures. The more calcium in the bones, the better the bone density
Which of the following would produce the greatest increase in bone calcium levels? A) calcitonin injection
B) calcitonin receptor blocker
C) parathyroid hormone injection
D) glucagon receptor blocker
A
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Which of the following is mismatched?
a. cytokinin; inhibits lateral root formation b. auxin; promotes cell elongation c. gibberellin; involved in phototropism and gravitropism d. abscisic acid; promotes stomatal closure e. ethylene; promotes leaf abscission
Like the insects, the arachnids (spiders and so on) have
a. three pairs of walking legs. b. one pair of antennae. c. true mandibles. d. an abdomen.
There are three alleles controlling the blood types ABO. I A and I B are codominant genes, so that the
combination I A I B produces the blood type AB. The third allele I O is recessive to the other two alleles. Indicate which of these parents could produce the given child:Parents Child Yes or No (a) A ? AB B (b) A ? O A (c) A ? B O (d) A ? AB O (e) A ? AB B (f) B ? B O (g) AB ? AB A What will be an ideal response?
Natural selection acts on ________, and ________ evolve
A) individuals; individuals B) individuals; populations C) populations; populations D) populations; individuals