Which of the following sequences best represents the path blood takes through vessels as it leaves and returns to the heart?
a. heart capillaries arterioles veins venules arteries heart
b. heart veins venules capillaries arterioles arteries heart
c. heart arteries capillaries arterioles venules veins heart
d. heart arteries arterioles capillaries venules veins heart
d
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Which of the following pairs is a mismatch?
a. Charles Darwin ----------? Natural Selection c. Linnaeus ------------> Fixed features of species b. Cuvier ----------? Catastrophism d. Lamarck ----------? Slow geological changes
During stressful situations, epinephrine initiates all of the following actions except:a
constriction of the blood vessels to the skin. b. constriction of the blood vessels to the heart. c. dilation of the blood vessels to the brain. d. an increase in metabolic rate. e. an increase in blood glucose levels.
DNA in extant prokaryotic cells is circular.
a. true b. false
Theoretically, based on the cohesion-tension mechanism, what should be the maximum height for the tallest trees?
a. about 3 m b. about 50 m c. about 75 m d. about 130 m