An artificial pacemaker supplements the actions of
a. sympathetic neurons.
b. the atrioventricular node.
c. the medulla oblongata.
d. the sinoatrial node.
e. the heart muscle itself
Answer: d
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Fill in the blank(s) with the appropriate word(s).
Lyell's theory of uniformity is the idea that ________
a. None of these answers b. rapid, sudden changes have changed the Earth c. gradual, repetitive changes have shaped the Earth d. lines of descent improve each generation as a result of internal drive by the organism e. catastrophic geological events have shaped the Earth
Which type of fermentation occurs in the bacteria found in yogurt?
a. Lactic acid fermentation b. Alcohol fermentation c. Butanol fermentation d. Mixed acid fermentation
The structure of C3 plants allows RuBP carboxylase to bind with ____ during photorespiration.
What will be an ideal response?