In the process some of the mass of the hydrogen atoms is converted into energy in the form of light. The same process occurs in thermonuclear (fusion) bombs. In the Sun the process occurs in a controled manner. In a bomb it happens all at once in a big chain-reaction explosion.
Phloem. Definition. noun. A tissue in a vascular plant that functions primarily in transporting organic food materials (e.g. sucrose) from the photosynthetic organ (leaf) to all the parts of the plant.
Xylem and phloem are the two types of vascular tissues found in plants. Xylem tissues transport water from the roots throughout the plant, while phloem transports food (suga â¦ rs) from photosysnthesis throughout the plant.Xylem: tubes that brings water and minerals from the roots into the leaf. There is a layer of living Phloem and there is a layer of living xylem. Both these layer produce dead tissue, the Phloem produces bark (dead protective outer layer), the â¦ xylem produces wood (dead supportive inner layer). Both the wood and the bark are dead.