Animals and plants are an important part of the ecosystem, which not only plays an important role in human survival and development, but also creates colorful nature. Wild animals and plants not only have important economic, scientific, ecological, cultural and aesthetic values, but also greatly enrich human cultural life.
Plants are one of the main forms of life, including trees, shrubs, vines, grasses, ferns, green algae, lichens and other familiar creatures. Plants can be divided into seed plants, algae plants, bryophytes, ferns and so on. It is estimated that there are about 450,000 existing species. Most of the energy of green plants is obtained from sunlight through photosynthesis, and temperature, humidity, light and fresh water are the basic needs of plant survival.
The fundamental difference between animals and plants
1, from the basic structure of cells, plant cells have cell walls, but animal cells do not.
2. From the point of view of nutrition and metabolism, plants are autotrophs, which can convert inorganic substances into organic substances, while animals are heterotrophs, which can only use existing organic substances.
3. From the perspective of ecosystem composition, plants are producers and animals are consumers.
Literally, the earliest animals on the earth originated from the ocean. They generally feed on organic matter, things that can feel, move, move independently or move, including people. All animals belong to the animal kingdom. Plants have obvious cell walls and nuclei, and the cell walls are composed of glucose polymer cellulose. Most solid substances in plants are obtained from the atmosphere and cannot be moved.