All living things have metabolism. For example: animals, plants, microorganisms, viruses, even cells, a green leaf, a branch, a living heart, germ cells and so on.
Metabolism is the most essential difference between living things and non-living things. Note: Metabolism means that metabolism is the general term for all orderly chemical reactions in organisms.
1, all organisms with the same genetic material (ignoring the slight differences between organisms) are regarded as the same class (species). For example, human cells, hearts and fertilized eggs are all regarded as the same kind of creatures.
2. Germ cells are regarded as the type (species) of female parents. For example, the sperm of a horse is the same as that of a horse, and so is the egg of a donkey. The fertilized egg produced by the combination of horse sperm and donkey egg is similar to that of mule.
Biology in a narrow sense
Biology refers to an independent organism in the traditional sense. Include animals, plants and microorganisms.
Biology is sometimes short for biology:
Biology is a subject that studies life phenomena and the laws of life activities. It is the foundation of agronomy, forestry, medicine and environmental science. The development of society, the progress of human civilization and the improvement of personal life quality all depend on the development and application of biology. Biology is too important for human beings, and human life can not be separated from biology everywhere.
[Edit this paragraph] Basic characteristics of living things
1. All living things have metabolism.
2. All living things can respond to external stimuli: the response of lower animals is called stress. Advanced animal reactions are called "reflexes".
All living things can grow, reproduce and develop.
4. Organisms are characterized by heredity and variation.
All living things are made up of cells except viruses.
6. All living things can breathe.
7. Have the same material and structural foundation;
8. Be able to adapt to a certain environment and change the environment;
9. Living things need nutrition;
10. Bioenergy can excrete waste in the body.
Nutrients do not have these characteristics, so it is far-fetched to use nutrition and health. It's easier to make handwritten newspapers with plants as the theme.