Photosynthesis -. Part I: The Sun and Light. Not all of the light from the Sun makes it to the surface of the Earth. Even the light that does make it here is reflected and spread out. The little light that does make it here is enough for the plants of the world to survive and go through the process of photosynthesis. Light is actually energy, electromagnetic energy to be exact. When that energy gets to a green plant, all sorts of reactions can take place to store energy in the form of sugar molecules.
For your GCSE Science exams, you need to be able to compare the differences between different types of cells.1  Education. 2  Standard YouTube License.or your GCSE Science exams, you need to be able to compare the differences between different types of cells. 1  Education.
Other stem cells don't have as much potential for self-renewal and can't make as many types of cells. The most basic kind of stem cells are the cells that make up an embryo soon after an egg is fertilized. These stem cells divide over and over, eventually making almost all the different cells in the body. Adult stem cells, in contrast, are fully differentiated.. That means they are what they are and do what they do. They can't choose another career. In many organs, however, adult stem cells linger throughout life.