During the carboniferous period, virginia was equatorial and the warm seas supported abundant life and the deposition of lime sediments. the limestones produced from these sediments contain fossils of bryozoans and relatives of sea urchins and sand dollars. on land, coastal swamps formed along what is now the appalachian plateau. tree ferns, horsetail rushes, and other plants grew in abundance in these swampy lowlands. this warm, tropical environment was the original source of what natural resource mined throughout this area during the past century?

The correct answer is coal.

The coal was produced in the carboniferous period by the deposition of the dead remain of the plant and the animals. The steamy swamps present at the time of carboniferous period allowed the thick peat to form, which eventually got buried in the ground and by the action of the heat and the pressure, the peat formed coal, which is mined now.

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these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.