Specialists are adapted to fill a very narrow niche in a habitat, and when humans or other wildlife cause their one food to change, then the specialist becomes threatened.
By "receiving chambers," I'm not sure if you mean the right atrium and left atrium or the right and left ventricles because those are also chambers within the heart that receive blood in the blood flow cycle.
A DUI; driving under influence
<span>carbon dioxide(CO2) is recycled. In photosynthesis oxygen is recycled.</span>
Carbonates + acid ----> water + salt + carbon dioxide
