The resting potential across a typical neuron
membrane is approximately ____ inside
relative to outside.
a. ?70 microvolts
b. ?70 millivolts
c. ?70 volts
d. +70 millivolts
e. +70 megavolts
B
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What mechanism leads to changes in allele frequencies due to random chance?
A. Genetic drift B. Natural selection C. Sexual selection D. Neutral variation E. inbreeding
What is the significance of double fertilization in flowering plants? What will be an ideal response?
What is the boiling point of water?
A. 212 degrees F B. 100 degrees C C. 32 degrees C D. 373 K
Which examples would be considered different species under the biological species concept? Check all that apply.
A. Two plant species with no gene flow between them. B. Two bear species are able to breed in zoos, but have separate ranges in nature. C. Two tree species have different leaf shapes, but form hybrids in their overlapping ranges. D. Two skunk species look morphologically similar, but are unable to interbreed. E. Two snake species look different, but often form fertile hybrids.