During photosynthesis, unused oxygen atoms form oxygen gas (O2) that is released as a waste product. How did these oxygen atoms originally enter the plant? A. They were part of the ATP molecules gathered by the chloroplasts.
B. They were part of the sugar molecules (C6H12O6) the plant brought in for food.
C. They were part of the carbon dioxide (CO2) molecules that entered through the leaves.
D. They were part of the water molecules (H2O) pulled in through the roots.

Photosynthesis converts solar energy into what type of energy?

What molecule does hemoglobin decay into over time

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.