Erythropoietin from the kidneys stimulates production of ________ .
a. glucagon
b. insulin
c. gastrin
d. T cells
e. red blood cells
Answer: e. red blood cells
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The organisms that cause pneumococcal pneumonia are rarely found as a part of the normal flora of healthy adults
Indicate whether the statement is true or false.
Lungs evolved from the __________ of fish
a. gills b. integuments c. circulatory systems d. gut walls e. thoracic walls
How does the process of pollination increase the likelihood that a species of plant will survive?
A. Pollen provides food for bees. B. Pollination mixes genes from several plants. C. Pollinators become stronger by eating the pollen. D. Pollination provides insects with genetically diverse sperm.
If you close your eyes, hold your hands over your eyes for a short time, and then uncover your eyes, your pupils will be
A) a darker color than normal. B) smaller than normal. C) larger than normal. D) a lighter color than normal.