Which of the following is a bone of the lower

leg in humans?



a. femur
b. fibula
c. radius
d. ulna
e. humerus


B

Biology & Microbiology

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Cell-signaling molecules are generally which type of macromolecule?

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What mineral is responsible for more functions than any other mineral, including being a component of nucleic acids?

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Plants require a lot of water for transpiration, metabolism, and photosynthesis.  How is water used in photosynthesis?

A. as a substrate for ATP synthase B. to combine with NADP+ to form NADPH C. to combine with ADP forming ATP D. as an electron donor E. as an electron acceptor

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Which of the following best describes IgM antibodies?

A) They cause basophils and eosinophils to degranulate. B) They are the most common type of antibody in the blood during the initial phases of an immune response. C) They are the antibody class found in body secretions. D) They interact with phagocytes and NK cells. E) They can cross the placenta to provide passive immunity.

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