The functional groups determine the shapes of macromolecules and this in turn determines their functions
<span>Histamine might be released for the blood vessels. This will cause them to constrict and stop the inflammation. When an allergen is taken in by the body, this causes the system to release the histamine as a way of helping those blood vessels dilate and lower a person's blood pressure.</span>
The female sex cells are called the egg and Male sex cells are called the sperm. Hop this helped.
Answer:
Surface water <---> river
Ground water <------> well
Water vapour <------> atmosphere
Glacier <-------> ice
Explanation:
