The answer is C, the basic unit of inheritance
Mercury would bind to the mer operon to act as an activator whereas the less toxic products from the pathway would acts as a repressor.
<span><span>The carboxyl end of the G- protein-coupled receptor (GPCR) is located in the cytosol (it is intracellular). Carboxyl terminus is one of the most variable structures of the protein. All of the GPCR are </span><span>structural and functional similar, unlike their ligands.</span></span>
The answer is B. Multiple food chains make up a food web of an ecosystem. A food web is made up of multiple food chains, and shows the relationships between different organisms in an ecosystem.