Where does a plant get the carbon dioxide that it needs for the dark reaction (Calvin Cycle) of photosynthesis?

What in scientific term why the salty popcorn causes this thirst

Which is a function performed by stem cells in the skin a. replacing lost skin cells b. making cells for the intestines c. growing new organs d. differentiating into brain cells plz apex

Which characteristic should describe all evidence collected by a scientist? true obvious objective subjective