Doesn t biology clearly divide what is a living thing

Biological science refers to the discipline system that studies life activities and their development laws, including molecular biology, physiology, ecology, genetics and other disciplines. Biological science is the exploration and application of biology, involving the development and utilization of biological resources, the development of diseases, the research and development of new drugs for digital difficulties, and environmental protection. There is an inseparable relationship between the two.

Biological science is a pure science, the study and exploration of life phenomena, and the study of discovering laws. It encompasses the study of molecules, cells, tissues, organs, populations and other levels, aiming to understand the nature and mechanism of life.

Biological science is the application and expansion of biology, and plays an important role in the development and utilization of biological resources, the research and development of new drugs, the development of diseases and environmental protection. The object of study in biological science is no longer limited to the basic laws of life, but involves issues closely related to human beings.

For example, biological science research has discovered the pathological mechanism of pathogenic bacteria, and biological science has used this as the basis for vaccine production and drug research and development, which has effectively prevented and treated various diseases. In addition, the application of bio-potato science also includes food processing, bio-fiber, energy and other fields.

In conclusion, biological sciences and biological sciences are closely related but have different fields and goals. Biological science is the exploration of life phenomena, while biological science is the application and expansion of research results. <>

1. Biology is a science that studies the structure, function, occurrence and development of organisms (including plants, animals and microorganisms), and is a part of natural science.

2. The purpose is to clarify and control life activities, transform nature, and serve the practices of agriculture, industry and medicine. For thousands of years, China has accumulated a wealth of knowledge about plants, animals, microorganisms and the human body in the practice of agriculture, forestry, animal husbandry, sideline products, fishery and medicine.

In the same year, the British naturalist Charles Darwin's "On the Origin of Species" was published, which established the materialist view of biological evolution and promoted the rapid development of biology.

The basis of biological taxonomy is that organisms are mainly divided into different levels such as species and genera according to the degree of similarity of organisms, including morphological structure and physiological function.

Significance of taxonomy:

1. Taxonomy is the basis for understanding biodiversity.

2. Taxonomy is the basis for the conservation of biodiversity. Caution.

Taxonomy is also known as taxonomy.

The classification system is a hierarchical system, which usually includes seven main levels: Boundary, Phylum, Class, Order, Family, Genus, and Species. The species is the basic unit, the closely related species are grouped into genera, the closely related genera are grouped into families, the family is subordinate to the order, the order is subordinate to the class, the class is subordinate to the phylum, and the phylum is subordinate to the boundary.

With the progress of research, the taxonomic level continues to increase, and secondary units can be attached to the upper and lower units, such as general order, subclass, subclass, general order, suborder, general family, subfamily, etc. In addition, new units can be added, such as stocks, groups, families, groups, etc., the most permanent of which are families, between subfamilies and genera.

1. Taxonomic units.

1 From largest to smallest: Boundary, phylum, class, order, family, genus, and species.

2 The most basic unit - the section.

2. Taxonomic basis.

Organisms are characterized in morphological structure.

3. Taxonomic significance.

1. Taxonomy is the basis for understanding biodiversity.

2. Taxonomy is the basis for the conservation of biodiversity.

Taxonomy is the branch of biology that studies the methods and principles of taxonomy. Taxonomy is to follow the principles and methods of taxonomy to name and rank various groups of organisms. The Swedish biologist Linnaeus named the organisms, and then the biologists classified them by domain, kingdom, phylum, class, order, family, genus, and species.

The uppermost realm, the five realms proposed by Waittaker, are more accepted by many people, namely the prokaryotic remnant realm, the protist kingdom, the fungal kingdom, the plant kingdom, and the animal kingdom. Starting from the "boundary" at the top to the "species", the lower the level, the more similar the characteristics of the creatures to which they belong.

At present, the most popular classification is a system of five kingdoms, namely prokaryotic kingdom, protist kingdom, fungus kingdom, plant kingdom and animal kingdom. The Five Realms system reflects the three stages of biological evolution and the three branches of the multicellular stage, and is classified vertically and horizontally. It does not include viruses of noncellular form, perhaps because of the unknown status of the viral system.

Its protist kingdom is vast and complex, including all protozoa and other eukaryotic algae except red algae, brown algae, and green algae, including different animals and plants. Example: Zebrafish phylum genera and species:

Animalia, Vertebrate phylum, Bony Fishes, Cypriniformes, Cyprinidae, Brachymonis.

Categories: Science & Engineering.

Analysis: Definition of living things.

Referring to some previous research results, the concept of biology is given a complete definition here.

An organism is an object, and its elements include: molecules with the ability to reproduce and exist independently generated under natural conditions or mutated by other organisms, and the whole organically organized by molecules, ions, etc., as well as the offspring produced by their reproduction. In other words, there are two types of creatures, which are:

1. Molecules with the ability to reproduce and exist independently generated under natural conditions or mutated by other organisms, and the whole organically organized by molecules, ions, etc.; (Creatures with reproductive abilities).

2. Progeny produced by reproduction of molecules with reproductive ability and independent existence generated by natural conditions or mutation of other organisms, or by the organic organization of molecules, ions, etc. (Mobs that do not have the ability to reproduce).

The main advantages of this definition over other biological definitions are as follows:

1. The definition encompasses both reproductive and non-reproductive organisms. As you know, some special individuals, such as mules and worker bees, do not have the ability to reproduce, but they still belong to the category of living things, but some "classical" definitions exclude them from the category of living things.

2. The conditions for the creation of new types of organisms are restricted, and artificial robots with self-replicating abilities are not included in the category of organisms, and the evolution of organisms is recognized.

3. The definition of "having the ability to exist independently" excludes cells with self-replication ability in some organisms from the category of organisms.

4. The definition of "holistic" excludes a single begonia leaf that has the ability to reproduce from the category of organisms, unless new roots and leaves grow on the begonia leaf. Because begonia leaves with reproductive ability are alive, it can be seen that living objects are not necessarily living things.

5. The definition of "fertile" excludes germ cells such as ** and eggs from the category of organisms because they are not capable of reproduction.

The common characteristics of the organisms within the unit species were the most common, and the kinship was the closest.

The taxonomic hierarchy of organisms from largest to smallest is kingdom, phylum, class, order, family, genus, and species. The greater the hierarchy to which the organism belongs, the more distant the kinship between the organisms and the fewer common traits there are; The smaller the level of the organism, the closer the creature is related to each other, and the more common traits there are. The smallest rank in A, B, C, and D is the D species.

Therefore, it is the D species that contains the most common characteristics of living things.

Taxonomy is a fundamental method of studying living things. Biological classification is mainly based on the degree of similarity of organisms (including morphological structure and physiological function, etc.), to divide organisms into different levels such as species and genera, and to scientifically describe the morphological structure and physiological function of each taxa, so as to clarify the kinship and evolutionary relationship between different taxa.

History of Taxonomy:

Humans have long been able to identify objects and give them names. In the early Han Dynasty, Erya divided animals into four categories: insects, fish, birds, and beasts: insects include invertebrates in front of the great gods; Fish include fish, amphibians, reptiles and other lower vertebrates, whales, shrimps, crabs, shellfish, etc., birds are birds; Beasts are mammals.

This is the earliest classification of animals in ancient China, and the generation period of the four types of names seems to be no later than the Western Zhou Dynasty. This classification, compared with Linnaeus's six-class system, only lacks two classes: amphibians and helminths.

The ancient Greek philosopher Aristotle used the method of trait comparison to distinguish between species, such as classifying hot-blooded animals into one category to distinguish them from cold-blooded animals. He arranges the animals in order of the degree of perfection of their structure, giving the idea of a natural ladder.

At the end of the 17th century, the British botanist Ray had described the plant species known at that time as genera and species, and his book "New Methods of Plant Research" was the most comprehensive summary of plant classification before Linnaeus, and Ray also proposed "hybrid sterility" as a criterion for distinguishing species.

Modern taxonomy was born in the 18th century and was founded by the Swedish botanist Linnaeus. Linnaeus solved two key problems for taxonomy: the first was the establishment of a binomial system, in which each species was given a scientific name, consisting of two Latin pseudonyms, the first representing the genus name and the second representing the species name.

The second is the establishment of the order system, Linnaeus divided the natural world into three kingdoms of plants, animals and minerals, and under the animal and plant kingdoms, there are four levels: class, order, genus and species, thus establishing the order system of classification.