an natural pathway by which essential elements of living matter are circulated.
Nitrite was the preferred nitrogen for denitrification,followed by nitrate and no significant
Answer: C
Explanation: Left ventricle. With the thickest muscle mass of all the chambers, the left ventricle is the hardest pumping part of the heart, as it pumps blood that flows to the heart and rest of the body other than the lungs.
Which is one of the six fundamental elements that are found in living organisms?