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Anonymous users2024-02-15Biology is a collective term for animals, plants, fungi, bacteria, viruses, etc.
1. If it is divided by boundary.
According to the two realms, it is the plant kingdom and the animal kingdom.
2. According to the Three Realms, it is the plant kingdom, the animal kingdom, and the protist kingdom.
3. According to the four realms, it is the plant kingdom, the animal kingdom, the protist kingdom, and the prokaryotic kingdom.
Fourth, if it is said according to the five realms, it is the plant kingdom, the animal kingdom, the protist kingdom, the prokaryotic kingdom, and the fungal kingdom.
The five and six kingdoms are the plant kingdom, the animal kingdom, the protist kingdom, the prokaryotic kingdom, the fungal kingdom, and the non-cellular kingdom (viruses).
Microorganisms are a large group of organisms including bacteria, viruses, fungi and some small protozoa, which are small but closely related to human life. Microorganisms can be described as "ubiquitous and ubiquitous" in nature, covering many beneficial and harmful species, and widely involved in health, medicine, industry and agriculture, environmental protection and many other fields.
Microorganisms are the general term for all tiny organisms that are invisible or unclear to the naked eye. They are small and simple creatures. Most are unicellular, a few are multicellular, and some organisms without a cellular structure are also included.
In China, microorganisms are divided into the following 8 categories: bacteria, viruses, fungi, actinomycetes, rickettsia, mycoplasma, chlamydia, and spirochetes.
7. Indicator organisms.
Indicator organisms refer to organisms that have certain indicator characteristics for a certain environmental characteristics, which can be divided into sensitive indicator organisms and tolerant indicator plants, and can also be divided into water pollution indicator organisms, air pollution indicator organisms, and soil pollution indicator organisms.
The use of indicator organisms to carry out biological monitoring can reflect the comprehensive biological effects of environmental pollution to a certain extent, and is one of the effective means of environmental monitoring.
II. Definitions. Indicator organisms, also known as biological indicators, refer to those organisms that can indicate the characteristics of the environment or a certain environmental factor through changes in their characteristics, numbers, species or communities within a certain area. In terms of environmental protection, some sensitive organisms are commonly used to indicate the status of environmental pollution.
For example, gladiolus can indicate the pollution status of hydrogen fluoride, lichen can indicate the pollution status of sulfur dioxide, and the number of ververvets can indicate the degree of organic pollution in the water body. Indicator organisms include indicator plants, plankton, zodiacs, benthic animals, fish and bacteria.
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Anonymous users2024-02-14生 [ shēng wù ].
Vocabulary book. Basic Definition Detailed Definition Dictionary Definition.
shēng wù ]
Refers to all living objects in general.
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