The answer is amino acid
the basic building block of a protein is called an amino acid. There are 20 amino acids in the proteins you eat and in the proteins within your body, and they link together to form large protein molecules.
Potential energy, since it has stored mechanical energy
Carbon dioxide is returned to the atmosphere primarily by respiration of humans, (exhalation to be precise). The return of carbon dioxide to the atmosphere is also possible by the decay of plants and animals and combustion, which is the process of burning something.
The periderm is a multilayered tissue that is different from the epidermis which is single layered. It is made of cork cells (phellem) , phelloderm and phellogen (or cork cambium).
Cork cells are nonliving cells found covering the outside of roots and stems to provide protection and insulation to the plant.
The periderm serves to protect the plant from injury, pathogens, excessive water loss and provides insulation for the plant.
