Answer:
Yes
Explanation:
When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide. To cope with this extra demand, your breathing has to increase from about 15 times a minute (12 litres of air) when you are resting, up to about 40–60 times a minute (100 litres of air) during exercise.
Animal cells do not have cell walls<span> because they </span>do not need<span> them. </span>Cell walls<span>, which are found in </span>plant cells<span>, maintain </span>cell<span> shape, almost as if each </span>cell has<span>its own exoskeleton. This rigidity allows </span>plants<span> to stand upright without the </span>need<span> for bones or musculature.</span>
Skin<span> is an elastic covering. It </span>protects<span> you against exposure to dangerous things in the environment such as bacteria. Since they form an elastic cover, they are able to B)Extend and contract for movement.</span>
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Answer: <em>C. </em>to a large majority of the population.
Explanation:
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