1, animals get substances from the outside to provide energy for themselves.

2. Plants absorb water, small molecular substances containing nitrogen, sulfur and phosphorus and inorganic salts from the outside for their own photosynthesis.

Second, different: they get different energy.

1. Green plants are autotrophs and rely on photosynthesis to generate energy for their own consumption.

2, the animal is heterotrophs, relying on external energy.

Extended data:

Plants have the ability of photosynthesis-that is, they can use light energy and chlorophyll that animals don't have, use water, inorganic salts and carbon dioxide for photosynthesis, release oxygen and produce glucose-energy-rich substances for plants to use.

The photosynthetic rate of plants varies with plant species, growth period and accumulation of photosynthetic products, and is also affected by environmental conditions such as light, CO2, temperature, moisture, mineral elements and O2.

The effects of these environmental factors on photosynthesis are not isolated, but interrelated and interactive. In a certain range, the more suitable various conditions are, the faster the photosynthetic rate is.

Plant refers to another biological relationship corresponding to animals. The difference between animals and plants is formed in the process of long-term evolution. But as far as micro-organisms are concerned, the difference between them is sometimes not obvious.

As an evolutionary trend of plants, the establishment of an independent material metabolism model, such as individual development formed by cell accumulation, cell wall formation and chlorophyll photosynthesis, is the main feature, and immobility on this basis is the secondary feature.

It is estimated that there are about 300,000 species of plants in existence. Fungi, which account for more than half of the plant kingdom, divide plants into two groups because of the lack of chlorophyll, while others think that the whole biological world can be divided into three groups: animals, fungi and plants.

As far as the classification system is concerned, seed plants (flowering plants) were once regarded as the classification focus, and later they were transferred to the so-called cryptoflowering plants. At present, the plant kingdom is divided into 10 ~ 13 phylum, and seed plants are only one of them.

Baidu encyclopedia-biological classification

Baidu encyclopedia-plants

Baidu encyclopedia-animals