Bottlenose dolphins breathe air but can sleep in the ocean because _____
A) they sleep for only thirty minutes at a time, which is the maximum interval they can cease breathing
B) they fill their swim bladder with air to keep their blowholes above the surface of the water while they sleep
C) they move to shallow water to sleep, so they do not need to swim to keep their blowholes above the surface of the water
D) they alternate which half of their brain is asleep and which half is awake
D
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A large number of the genes shared by bacteria and Archaea produce proteins that are involved in ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not a reason to genetically engineer crop plants?
A) disease resistance B) herbicide resistance C) drought tolerance D) decreased yield E) enhanced nutrients
Assuming resting conditions at sea level, what is the partial pressure of oxygen in systemic arteries?
A) 46mmHg B) 100mmHg C) 80 mm Hg D) 40 mm Hg E) 160 mm Hg
Identify the stage (or stages) of cellular respiration that occurs entirely outside of the mitochondria
A) Citric acid cycle B) Electron transport chain C) Glycolysis D) All of the above