Which of the following should be present in the
human diet in the highest percentage?
a. protein
b. carbohydrate
c. lipid
d. vitamins
e. minerals
Answer: b
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Which of these is the best example of an umbrella species?
A. northern spotted owl. B. brown tree snake. C. humpback whale. D. giant panda. E. Gopher tortoise.
Animal cells commonly have polysaccharides attached to ____ in their surface membranes
a. proteins b. nucleic acids c. lipids d. both nucleic acids and lipids e. both proteins and lipids
How do lipid insoluble hormones affect targets within the cell?
a. They bind to channel proteins for transport into the cell. b. They hydrolyze receptors for lipid soluble hormones, blocking their action. c. They trigger the release of a second messenger in the cytoplasm. d. Lipid insoluble hormones are synthesized and remain inside the cell.
Answer the following questions
a. Over time, pressure and heat transformed the compacted organic remains of Carboniferous forests into ____. b. Ancient relatives of ____ and ____ dominated in the Carboniferous forests.