The three general categories of blood function are transport, regulation, and

i think the answer would be d

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

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photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.