Which human cells exhibit endopolyploidy?
A. Sex cells
B. Nerve cells
C. All somatic cells
D. Liver cells
E. Red blood cells
D
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In which of the following organisms does blood flow from the pulmocutaneous circulation to the heart before circulating through the rest of the body?
A) annelids B) molluscs C) fishes D) frogs E) insects
Which statement about immunodeficiency is true?
a. Immunodeficiencies allow pathogens to proliferate. b. Immunodeficiencies are typically present at birth. c. Immunodeficiencies tend to trigger hypersensitivities. d. Immunodeficiencies block autoantibodies from developing.
Because the smooth ER does not contain ____, it cannot produce proteins
a. Golgi bodies b. mitochondria c. ribosomes d. DNA e. lysosomes
A mixed solution of water and small molecules is exposed to a cell membrane and allowed to interact for an hour. Which molecule would be most likely to cross the phospholipid bilayer without the aid of transport proteins and diffuse across the membrane the fastest?
A. O2 B. Estrogen (C18H24O2) C. NH4+ D. Na+ E. CH3COO-