Which statement about cholesterol is TRUE?
a. If the blood contains too much HDL, cholesterol may be deposited on the arterial wall.
b. LDLs transport cholesterol from cells to the liver when cholesterol levels are high.
c. LDLs must bind with an LDL receptor on the cell membrane to be taken up by cells.
d. Most plasma cholesterol is transported on HDLs or high-density lipoproteins.
e. Omega-3 fatty acids are thought to decrease HDL levels
c
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The colonial theory of animal origins states
that animalsa. migrated on land from sponge colonies in the ocean. b. originated in the Colonial geologic period. c. evolved from autotrophic green alga colonies. d. evolved from heterotrophic colony-forming protists. e. colonized land before they colonized the seas.
a. migrated on land from sponge colonies in the ocean. b. originated in the Colonial geologic period. c. evolved from autotrophic green alga colonies. d. evolved from heterotrophic colony-forming protists. e. colonized land before they colonized the seas.
Different genotypes for the CYP2D6 gene produce significantly different responses to tamoxifen, the
medication of choice for treatment of most cases of ____________________. Fill in the blank(s) with the appropriate word(s).
________, which is provided by the photosystem, provides a source of hydrogen and the energetic electrons needed to bind them to carbon atoms.
Fill in the blank(s) with the appropriate word(s).
Which feature is not found in protozoans?
A) usually heterotrophic B) performs photosynthesis C) unicellular D) no cell walls E) may reproduce sexually or asexually