Monomers are joined by the COVALENT BOND..........
Answer: chlorophyll
Explanation: the green color compound present in the leaf is chlorophyll. Chlorophyll is a chemical or a molecule that is present within the chloroplast of the leaf.
This compound is responsible for the conversion of carbon dioxide and water with the help of light energy of the sun into sugars. And plant prepares its food through this chemical compound. This process is known as photosynthesis.
Because we now know that antibiotics can only treat bacterial infections. this includes strep throat and other things such as urinary infections. They won't treat viruses. You can treat the symptoms, but you can not treat the virus.
(Your doctor will also give you a prescription to prevent infection.)