Enzymes are proteins catalysts and speed up reactions by lowering the energy needed to start them. Catalysts speed up the reactions in the cells so that they can happen in a fraction of a second, making them happen more quickly. Without catalysts, most cell reactions would not happen even over long periods of time.
The role a of a digestive system is
Your digestive system breaks down the food you eat into nutrients such as carbohydrates, fats and proteins. They can then be absorbed into your bloodstream so your body can use them for energy, growth and repair.
The pH scale ranges from 0 to 14
Because water helps them grow.. when you poue water on a flower is suks the water in and then it goes underground and the soils suk it in and grow 10 cm every day you water them