Over a millions of years of animals and plants being crushed down in the ground<span />
<span>A) similar evidence collected in multiple experiments by different people
Hope this helps!</span>
The main function of the respiratory system is to allow the exchange of gases between the atmosphere and the lungs.
Hence,the only structure that carries out this function is the alveoli as other structures such as the nose,trachea and pharynx transport gases to the alveoli just so that it can can out its function.
The process of cellular respiration catabolic pathway that breaks molecules into energy
<u>Explanation:</u>
Metabolic pathways consist of two distinct types: catabolic and anabolic. Catabolic deliver energy while breaking down molecules into easier molecules. Cellular respiration is one case of a catabolic pathway. During cellular respiration, sugar is held in by the cell and break to discharge energy that enables us to live.
Cellular respiration is the manner of oxidizing food particles, similar glucose, to carbon dioxide and water. The method transpires in two states:
- glycolysis, the division of glucose to pyruvic acid
- the entire oxidation of pyruvic acid to carbon dioxide and water
A. <span>Pollution made in one country might contaminate the ground, water, and air of other countries.</span>