What initiates the extrinsic clotting mechanism?
a. activation of thrombin
b. release of substances outside of the blood
c. aspirin
d. conversion fibrinogen to fibrin
e. activation of factor X
ANSWER: b
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Staphylococcus aureus produces ________, an enzyme that results in the accumulation of fibrin around the bacterial cells
A) coagulase B) collagenase C) lipase D) M protein
Photosynthesis is to the chloroplast as ________ is to the mitochondrion.
Fill in the blank(s) with the appropriate word(s).
Most epidermal cells are ___
a. melanocytes b. keratinocytes c. collagenocytes d. phagocytes e. erythrocytes
American sycamore (Platanus occidentalis) and European sycamore (Platanus orientalis) are tree species that will interbreed if planted nearby but will not normally interbreed because they occur on different continents. This is an example of
A. temporal isolation. B. habitat isolation. C. gametic isolation. D. mechanical isolation. E. behavioral isolation.