答案：【计分规则】: (1) Comparison of element composition. The types of components of plants and animals are basically the same, that is, oxygen is the most, followed by carbon and hydrogen, and Ca and P are less. （1 point）There is a large difference in the element content of different plant species, the difference is small among animals. The content of Ca, P, and Na in animals is higher than that of plants, while K is lower than that of plants. Other trace elements are relatively stable. （1 point）(2) Comparison of compound composition1) CarbohydratesCarbohydrates are the most different nutrients in animals and plants.Plants have the highest carbohydrate content, mainly composed of crude fiber and nitrogen-free extract. （1 point）The carbohydrate content in animals is below 1%, mainly glycogen and glucose, and no crude fiber. (1 point)2) ProteinIn addition to true protein in plants, there are non-protein and amides. Protein in animals are mainly true protein, free AA and hormones, without other amides. （1 point）The protein content in animal body is high and relatively stable, and the protein quality is better than plant protein. （1 point）3) LipidsLipids are energy storage substances in animals, and the fat content in animals is higher than that of plants except oil plants. （1 point）In addition to real fat in plants, there are fat-soluble substances, such as fatty acids, pigments, waxes, phospholipids, etc.; animal bodies are mainly real fats, fatty acids and fat-soluble vitamins. （1 point）4) Moisture and AshThe water content of plants varies greatly, and the water content of adult animals is basically constant. （1 point）In terms of dry matter, the ash content of animals is higher than that of plants. （1 point）
