Intelligent planning would result in much similarity and parallelism between life systems because the most effective and efficient designs would be often used and shared as basic models. It should be added, however, that while there are many chemical and structural features common to all forms of life, there are also many differences which are difficult to explain on the basis of common ancestry. For example, while the majority of organisms use the same system of enzymes to metabolize the sugar glucose, there are also numerous variations of this scheme. The many variations in biochemistry and structure of living things would suggest a separate creation of types, while the common features would suggest a common Creator. The most fundamental difference between plants and animals is that plants have cells which contain chloroplasts, whereas animals do not.
Chloroplasts are tiny structures containing the green pigment chlorophyll.
The sugar molecules produced in this photosynthesis are linked together in chains to make larger carbohydrate molecules, mainly starches and cellulose. The oxygen gas is released into the atmosphere. Animals cannot make their food in this way, but must depend upon plants or other animals for food. Plants take the sun's energy and store it in high-energy food substances that animals can use.