How many things are in a plant cell

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

Will give ! ! widentify the advantages and disadvantages of renewable and nonrenewable energy resources.

What is gene expression control that occurs after the generation of rna