Answer:
This is the process where certain things like pesticides work their way into water bodies and then move to the food chain to greater concentrations as they are incorporated into meals of aquatic organisms e.g. zooplankton. An example is: small fish that eats plankton that has been tainted with mercury.
Explanation:
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Receptor proteins are molecules inside a cell or on its surface on which ligands bind. A ligand is any substance (e.g. a hormone, drug, functional group) that binds specifically and reversibly to another chemical entity to form a large complex.
Receptor proteins found inside a cell are called internal receptors or intracellular receptors or cytoplasmic receptors.
They act as regulators of mRNA synthesis to mediate gene expression.
When a ligand binds to an internal receptor, the receptor changes in conformation and exposes on itself a site that can bind to DNA.
The receptor joined to the ligand moves into the nucleus where it binds to a specific site on the cell DNA. Once bound, it promotes the process of transcription where information is copied from DNA to mRNA
Air pollution from coal mines is mainly due to emissions of particulate matter and gases including methane (CH4), sulfur dioxide (SO2), and nitrogen oxides (NOx), as well as carbon monoxide (CO).
There are numerous damaging environmental impacts of coal that occur through its mining, preparation, combustion, waste storage, and transport. Hope this helps!!!