The Answer To This Question Is C.
Punctuated equilibrium is a theory biology<span> which proposes that once </span>species<span> appear in the fossil record they will become stable.
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So according to above explanation
<span>C. puncated equilibrium</span> , is the correct
answer
<span> air pressure decreases, so does air density.</span>
Answer : Photosynthesis is an example of a chemical reaction.
Explanation :
Photosynthesis : It is a type of chemical process which takes place in the plant cell. In photosynthesis process, the light energy converted into the chemical energy.
As plant needs carbon dioxide, water and light. During the photosynthesis, carbon dioxide, water and sunlight react to gives glucose, oxygen and water as a product.
The balanced reaction of photosynthesis will be,

Hence, photosynthesis is an example of a chemical reaction.
Oxidative phosphorylation is the answer