The least oxygenated blood is indicated by the letter ____
a. A
b. B
c. C
d. D
e. E
ANSWER: e
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A sea star suffers from an infection that affects its ampullae. Due to the infection, the ampullae no longer function. What do you predict will be the effect on the sea star?
A. No noticeable effect will occur. B. The sea star will be unable to reproduce. C. The sea star will be unable to extend its tube feet. D. The sea star will be unable to store energy.
Crops have been genetically modified to resist
the herbicide,
a. glyphosate. b. DDT. c. triazine. d. 2, 4-D. e. atrazine
While synthesizing a new blue pigment, a chemist notices that the new compound accumulates between an aqueous (water) environment and a hydrophobic environment
When added to a mixture of oil and water, the pigment creates a blue ring around the droplets of oil. Which of the following statements best describes this new pigment? A) The pigment is a polar molecule and is forming hydrogen bonds with both the water and oil molecules. B) The pigment is hydrophilic and will not form hydrophobic bonds with the oil. C) The pigment is amphipathic, having polar and nonpolar regions. D) The pigment is neither polar nor nonpolar; it is apolar. E) The pigment is probably hydrophobic and is attempting to bond with the oil.
Which of the following would best be defined in part as an immune system overreaction?
A) chronic disease B) allergies C) cytotoxic T cell action D) cell-mediated response E) autoimmune disease