Photosystems<span> are functional and structural units of </span>protein complexes<span> involved in </span>photosynthesis<span> that together carry out the primary </span>photochemistry<span> of </span>photosynthesis<span>: the </span>absorption of light<span> and the transfer of </span>energy<span> and </span>electrons<span>.</span>
Answer: Your answer should be:
<u>C.</u><u> muscle cells during vigorous exercise</u>
Explanation:
Lactic acid is produced in your muscles and builds up during intense exercise.
Answer
Step 1: taken in by plants during photosynthesis.
Step 2: The animal eats a plant and uses it carbohydrates for energy.
Step 3: The animal releases the carbon dioxide back into the atmosphere during respiration.
Step 4: The cycle repeats when the carbon stored in the atmosphere as carbon dioxide gas is taken in.
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