In which type of vessel might you find a valve to assist blood flow?
a. artery
b. arteriole
c. capillary
d. venule
e. vein
ANSWER: e
Biology & Microbiology
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In North America, what is the greatest risk of warming to trees?
A) reduced growing season B) reduced water availability C) less variable precipitation D) Most species live near their thermal maximum.
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The surface of the respiratory membrane inside each alveolus is coated with a fluid consisting of a mixture of lipoproteins called .
a. air sac. b. bronchiole. c. respiratory membrane. d. surfacant.
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Parenchyma cells are located in all of the following structures EXCEPT the
A) cortex. B) mesophyll. C) pith. D) cuticle. E) vascular tissues.
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C4 plants
What will be an ideal response?
Biology & Microbiology