Sunlight.
Light
they use a micro-scope to find the cells
Organisms use the oxygen they absorb from the air for their cells. The cells need this oxygen in order to carry out their functions.
When light energy strikes a leaf then chlorophill (a) present in leaf absorb that light energy . By use of that energy photosynthesis occurs.
oxidation
Chloroplasts in leaves use sunlight for photosynthesis, producing carbohydrates from carbon dioxide and water. Chloroplasts aren't found in roots that are primarily underground and don't receive sunlight.
If you want to know about the leaves that are still attached on trees and what they absorb, here: As the sunlights rays hit the leaves,they abosorb as much as they can.When they do this,they send the energy particle they've absoorbed down through the trunk and into the roots.Here the roots use the rays to create food or energy for growth.They do this by using photosynthesis.
leaf cells contain chlorophyll which is found in the chloroplast cells which absorb the sunlight to cause photosynthesis. root cells are to collect the water and nutrients in the soil and as no sunlight reaches the bottom for the root cells chlorophyll isn't needed for the root cell
In standard-cell based design, leaf cells are already pre-designed and stored in a library for logic design use.
Chloroplasts in leaf cells are responsible for photosynthesis, the process by which they use sunlight to convert carbon dioxide and water into glucose and oxygen. This glucose is then used by the plant as a source of energy.
Endocytosis is an energy using process by which cells absorb molecules by engulfing them. "The process of endocytosis happens within cells. "
Chloroplasts are the organelles found in plant cells that absorb energy from sunlight and use that energy to drive chemical reactions through a process called photosynthesis, which produces sugars and oxygen.