Which of the following has the greatest potential to damage hair cells after prolonged exposure?
A) Noisy restaurant
B) Two humans talking
C) Noise from an urban street
D) MP3 player
E) A car engine
D
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Which of the following sex and generation combinations directly produces the pollen tube of angiosperms?
A) male gametophyte B) female gametophyte C) male sporophyte D) female sporophyte E) bisexual gametophyte
Identify the key feature of the action potential that ensures it will travel only one direction.
A. the activation state of the voltage-gated Na+ channel B. the inactivation state of the voltage-gated Na+ channel C. the activation state of the voltage-gated K+ channel D. the inactivation state of the voltage-gated K+ channel E. the temporary cessation in activity of the Na+/K+ pump
Compare and contrast the role of O2 and H2O in photosynthesis and cellular respiration
What will be an ideal response?
New world monkeys have all of the following features except
A. they have flat spreading noses. B. they evolved in isolation in South America. C. they are all arboreal. D. they grasp objects with long prehensile tails. E. they have ischial callosities (thickened rump pads).