A plant begin to produce its own food in the following cases:
-when the first leaves are formed
-as soon as photosynthesis starts
Even the little new seeds grown-up from the food reserves, but start making their owm food as they see sunlight
The alveoli. These little air sacs are found on the end of the bronchioles and are the place where oxygen enters the blood and the carbon dioxide leaves.
Climate, Land form/shape and fossils(he was most interested in this)
Mesophyll is a partí al reaction
