With any major scientific discovery, the previous work of many different scientists helps contribute to final conclusions . Which of the following scientists' work did not contribute to the discovery of the structure of the DNA molecule?

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"d.) carbon dioxide and hydrogen sulfide"

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.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.