Why does the earth's co2 level go up and down every year?
1.because the leaves in the fall die and fall off releasing carbon dioxide and performing
less photosynthesis allowing for more carbon dioxide in the atmosphere
2.we don't know
3.because the leaves in the spring and summer contribute to photosynthesis removing
more carbon dioxide

Energy derived from hot rocks and fluids beneath the earth’s surface is

Which of the following matches the organisms described with the correct domain? a. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycanb. archaea--multicellular, eukaryotic organisms that do not have cell wallsc. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sourcesd. bacteria--unicellular, eukaryotic organisms that always lack cell walls

_is a product of the first stage of photosynthesis.atpglucosecarbon dioxidewater