AP BIOLOGY

Detailed explanation-1: -They keep their stomata open during the day. In hot, dry areas, it is dangerous to leave stomata open during the day because the plants lose water through the stomata. The Calvin cycle takes place in the chloroplast for C3 plants.

Detailed explanation-2: -C3 plants keep their stomata OPEN during the day when the sun is out and CLOSED at night when sun is not shining. The carbon dioxide can get IN and Oxygen can get OUT during the day when the stomata are open. ON hot, dry, days, water loss (transpiration) is a PROBLEM.

Detailed explanation-3: -C3 plants include some of the most important sources of calories all over the world: cowpea, cassava, soybean, and rice. The regions where these crops are grown in are often hot and dry, meaning they could benefit from the energy-saving mechanisms of C4 photosynthesis.

Detailed explanation-4: -demonstrate that even in a phylogenetically-controlled analysis, C4 grasses have lower maximum stomatal conductance rates (gmax) than their C3 relatives.

Detailed explanation-5: -C3 plants are plants in which the initial product of the assimilation of carbon dioxide through photosynthesis is 3-phosphoglycerate, which contains 3 carbon atoms.