Because their bodies tell them that they need more oxygen and so breathe faster, and try and get the oxygen their body requires and depends on.
Well lets see here, The definition of population is a particular section, group, or type of people or animals living in an area or country. So it would be D.<span>
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Plants leafs increasing carbon dioxide. it's remove dust air pollution
Proteins<span> are large, complex molecules that play </span>many<span> critical roles in the body. ...</span>Proteins<span> are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains. There are 20 different types of amino acids that </span>can<span> be combined to make a </span>protein<span>.</span>
The ultimate purpose of life is to reproduce and pass on the genes to the offspring.
