Why is it believed that life cannot evolve on a planet that orbits a spectral type A, B, or O star?
a. These stars produce too much infrared radiation which would destroy carbon-based organisms.
b. These stars have very small life zones.
c. These stars are not capable of producing planets.
d. These stars do not remain on the main sequence long enough for life to evolve.
e. These stars take too long to form.
d
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The demographic transition:
a. includes a decrease in the death rate followed by a decrease in the birth rate as a population becomes industrialized. b. includes a decrease in the birth rate followed by a decrease in the death rate as a population becomes industrialized.
At equilibrium, the free energy of a reaction is which of the following?
A.) at its lowest point B.) energetically unfavorable C.) at its highest point D.) energetically favorable E.) equal to delta Gc
After reaching the inner ear, the frequency of a sound primarily affects
A. the vibrational amplitude of the tectorial membrane. B. the location of the greatest basilar membrane vibration. C. the amplitude of basilar membrane vibration.
If myelin was lost from the neuron firing the action potential graphed, the action potential cycle would
A) go much faster than depicted in the graph. B) go much faster than normal but not peak at 30 mV. C) go slower than depicted in the graph. D) go much slower than normal but peak much higher than 30 mV. E) remain the same.