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The Living World 8th Edition by George Johnson
Edition 8ISBN: 978-0078024214The Living World 8th Edition by George Johnson
Edition 8ISBN: 978-0078024214 Exercise 4
In order for amphibians to invade land, they had to develop which of the following?
A) a more efficient swim bladder
B) cutaneous respiration and lungs
C) watertight skin
D) shelled eggs
The evolution of the pulmonary veins was important for amphibians because it allowed
A) a single-loop circulation.
B) the metabolic rate to increase.
C) oxygenated blood to be pumped at higher pressures.
D) faster circulation to the lungs.
A) a more efficient swim bladder
B) cutaneous respiration and lungs
C) watertight skin
D) shelled eggs
The evolution of the pulmonary veins was important for amphibians because it allowed
A) a single-loop circulation.
B) the metabolic rate to increase.
C) oxygenated blood to be pumped at higher pressures.
D) faster circulation to the lungs.
Explanation
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Amphibians - frogs, toads, salamanders, ...
The Living World 8th Edition by George Johnson
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