Adding a fibrinogen inactivator to blood would:a
prevent the formation of thrombin.
b. prevent platelet formation.
c. prevent the blood from clotting.
d. prevent constriction of the blood vessels.
e. prevent hemoglobin synthesis.
C
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The ____ protists may cause dysentery after drinking contaminated water
amoeba
a. dinoflagellateb. apicomplexan c. amoeba d. ciliate e. water mold
Most scientific names are derived from
a. English. b. Latin. c. Italian. d. French.
Which one of the following statements about transport of nutrients in phloem is false?
a) Differences in osmotic concentration at the source and sink cause a hydrostatic pressure gradient to be formed. b) Companion cells control the rate and direction of movement of phloem sap. c) A sink may be located anywhere in the plant. d) A sink is that part of the plant where a particular solute is consumed or stored. e) Solute particles can be actively transported into phloem at the source.
If the X chromosome crosses over with the Y chromosome, the resulting gametes are likely to generate healthy offspring.
a. true b. false