Examlex
The formation of the fertilization envelope in a sea urchin egg is most directly stimulated by an increase in the cytosolic concentration of which of the following ions?
Energy Resource
Any natural or artificial substance or phenomenon that can be utilized to produce power, such as fossil fuels, solar, wind, or hydro power.
Oil And Gas
Natural resources that are extracted from the Earth and used primarily for energy and as raw materials in the production of chemicals.
Coal
A combustible black or brownish-black sedimentary rock formed from ancient plant matter, used primarily for electricity generation and steel production.
Oil Shale
Sedimentary rock that contains significant amounts of organic material in the form of kerogen, which can be converted into crude oil through heating.
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