* Carbon Dioxide (CO2): This enters the plant through tiny pores called stomata on the leaves.
* Water (H2O): This is absorbed by the roots from the soil.
* Light Energy: This is captured by chlorophyll, the green pigment found in chloroplasts, the organelles where photosynthesis occurs.
These molecules are located in different parts of the plant:
* CO2: Enters the leaves through stomata.
* H2O: Absorbed by roots and transported to the leaves.
* Light Energy: Absorbed by chloroplasts within the leaves.
It's important to note that these molecules are not all in the same place at the start of photosynthesis. They are transported and brought together within the plant, ultimately ending up in the chloroplasts where the light-dependent and light-independent reactions of photosynthesis take place.