<u>Answer:</u>
<em>The biological macro molecule protein can serve as a precursor to the production of cyanide.
</em>
<u>Explanation:</u>
<em>Cyanides are chemical compounds that contain the cyanide group(C≡N). </em>Based on the elements attached to the cyanide group cyanides can be classified into organic and inorganic cyanides.
<em>In inorganic cyanides the cyanide group is present as 
ion which makes them toxic. In organic cyanides group is not present and thus they are less toxic. </em>
Since nitrogen is the essential component in a cyanide, a biomolecule containing nitrogen will best act as the precursor to cyanide formation.
<em>The biomolecule protein is a long chain polymer of amino acids that contain nitrogen group. Thus proteins can act as precursor to cyanide formation.
</em>
Answer:
Producers produce food for their own consumption as well as energy for the rest of the ecosystem. Producers include any green plant, such as a tree or grass, as well as algae and chemosynthetic bacteria. Consumers are organisms that require food to survive. Deer and rabbits, for example, are primary consumers who only eat producers.
Photosynthesis is when green plants and some other organisms synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
Hope this helps!
The dry cleaning industry is the primary user of the chemical perchloroethylene (PCE). The research done by the researchers at the Boston university have found that the PCE chemical increases the risk of developing mental illnesses in the people working with it. Since, it is a common name in the dry-cleaning industry, the workers in this industry are much more prone to mental illnesses a compared to other people.
Hence, the answer is 'dry cleaning industry'.
