When a blood vessel is cut, why does vasoconstriction take place?
a. to expose collagen fibers to which platelets can adhere
b. to trigger the release of platelets from the surrounding tissues
c. to initiate the activation of thrombin
d. to entrap white blood cells
e. to reduce the flow of blood
E
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A foreign molecule that causes a specific immune response is a(n) ________.
A. antigen B. antibody C. marker D. PAMP E. hapten
The reduction of sulfate as a terminal electron acceptor during anaerobic respiration is called ________ sulfate reduction.
A. assimilatory B. amodulatory C. dissimilatory D. demodulatory
MPF is a dimer consisting of _____
A) a growth factor and mitotic factor B) ATP synthetase and a protease C) cyclin and tubulin D) cyclin and a cyclin-dependent kinase
What is the difference between pollination and fertilization?
A. Pollination is the movement of pollen from the male region of a plant to the female region. Fertilization is the union of a sperm and egg. B. Pollination is the movement of pollen from the female region of a plant to the male region. Fertilization is the union of a sperm and egg. C. Pollination is the same as fertilization. D. Fertilization is the movement of pollen from the male region of a plant to the female region. Pollination is the union of a sperm and egg.