Producers are where the cellular respiration occur in the biosphere.
The oxygen in the water molecule attracts the most electrons and in so doing attracts a slightly negative charge.
D prevents repeating. experiments have to be repeated to be reliable.
Leaves are green because of the presence of chlorophyll. The chlorophyll helps the plant in absorbing the lights lights having red and blue wavelengths. It actually reflects the lights with green wavelength. The chlorophyll helps the plants in making food. I hope that this is the answer that has come to your help.
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