Which of the following molecules enters kidney cells via a specific transporter?
A) water
B) carbon dioxide gas
C) cholesterol
D) ethanol
E) oxygen
Answer: A
Biology & Microbiology
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The seeds of many plant species are dispersed by a harmless temporary attachment to an animal's fur or feathers. This form of dispersal can be classified as
A. ectoparasitism. B. amensalism. C. mutualism. D. pollination. E. phoresy.
Biology & Microbiology
Which tissue assists in absorption and secretion, and in the movement of materials?
a. A b. B c. C
Biology & Microbiology
What does a neutral pH of 7 actually represent?
A) a greater number of H+ ions than OH? ions B) a greater number of OH? ions than H+ ions C) an equal number of H+ and OH? ions D) no H+ and OH? ions are present
Biology & Microbiology
Carbohydrates are composed of:
A. amino acids. B. fatty acids and glycerol. C. nucleotides. D. monosaccharides.
Biology & Microbiology