Which hormones slow down stomach emptying?
a. gastrin and somatostatin
b. somatostatin and secretin
c. leptin and gastrin
d. ghrelin and cholecystokinin
e. secretin and cholecystokinin
E
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Which of the following is a genetic mutation that affects males more than females?
A. nearsightedness B. red-green color blindness C. farsightedness D. astigmatism E. blindness
Features that are typical of K-selected organisms include all of the following except:a
late reproduction. b. slow development. c. a low reproductive rate. d. large body size. e. little parental care of offspring.
Labeling.The following statements refer to the accompanying figure showing the fine structure of a leaf
Figure 27.12A
A. Epidermis is labeled ____. B. Cells rich in chlorophyll and thus the main sites of photosynthesis are in layers labeled ____. C. The spongy mesophyll is labeled ____.
Which one of the following forms a bilayer structure that is found in cell membranes?
A) triglycerides B) amino acids C) cholesterol D) phospholipids E) saturated fats