Which of these is a method of obtaining petroleum?
o
a. aboveground mining
o
b. drilling ocean rock
o
c. electrical attraction
o
d. surface mining

What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.

Which type of stimulus do mechanoreceptors detect? sound pain heat light

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic