What are Bacteria What kind of organisms are bacteria?

It is a prokaryotic organism that does not have a nucleus and some organelles, such as mitochondria, chloroplasts, etc., but there are ribosomes that provide energy for life activities.

Bacteria can be divided into three categories based on their shape, namely: cocci, bacilli, and spirobacteria (including vibrio, spirobacteria, and helicobacter).According to the lifestyle of bacteria, it is divided into two main categories:

Autotrophic and heterotrophic bacteria, where heterotrophic bacteria include saprophytes and parasitic bacteria. According to the oxygen requirements of bacteria, they can be divided into aerobic (completely aerobic and microaerobic) and anaerobic (incompletely anaerobic, aerobic tolerant and completely anaerobic) bacteria. According to the classification of bacterial survival temperature, it can be divided into three categories: cold-loving, normal temperature and high-temperature preference.

But you can't say how many species you have, because the vast majority of bacteria haven't been studied in depth. A large number of strains were not found.

1. Bacteria (scientific name: bacteria) refers to one of the main groups of organisms and belongs to the bacterial domain.

2. Bacteria are also the most abundant of all living organisms, and it is estimated that there are about 5 10 30 of them. The shapes of bacteria are quite varied, mainly globular, rod-shaped, and spiral-shaped.

3. Bacteria also have a great impact on human activities. On the one hand, bacteria are the causative agents of many diseases, which can be transmitted between normal human bodies through various ways, such as contact, digestive tract, respiratory tract, insect bites, etc., which are highly infectious and extremely harmful to society.

4. The individual bacteria are very small, and the smallest bacteria currently known are only microns long, so most of them can only be seen under a microscope.

5. Bacteria are generally single-celled, with a simple cell structure and lack of nucleus, cytoskeleton and membranous organelles, such as mitochondria and chloroplasts.

Bacteria belong to a type of living organism.

Bacteria are one of the major groups of organisms and belong to the bacterial domain. It is also the most abundant of all living things. It is estimated that the total number is about 5,10,30.

The difference between bacteria and other pathogenic microorganisms is that there are no other organelles in the cytoplasm except ribosomes. The structure of bacteria also includes cytoplasm, cell membrane, and cell wall, which are common to all bacteria, and some bacteria also have some special structures, such as spores, flagella, fimria, and capsule, and some substances are related to bacterial pathogenicity.

Hazards

Bacteria are the causative agents of many diseases, which can spread diseases among normal human bodies through various ways, such as contact, digestive tract, respiratory tract, insect bites, etc., which are highly contagious and extremely harmful to society. In plants, bacteria cause leaf spot, fire blight, and wilting.

The invasion of the host by bacteria, including the adsorption of bacteria on the surface of the body, invasion of tissues or cells, growth and reproduction, production of toxins, and even the spread and resistance of the host A series of defense functions, resulting in body damage.

Bacteria belong to prokaryotes. Bacteria belong to the bacterial domain, and the types of bacteria are also the most common organisms found now, and the shape of bacteria is ever-changing, there are all kinds of shapes, and the more common ones are spiral, spherical and rod-shaped. In addition to specially treated clean rooms, bacteria are generally present in every corner of our living environment.

That's all there is to the question "What kind of organisms do bacteria belong to?" This is followed by a supplement on bacteria, which interested viewers can continue.

1. Dangerous bacteria: Bacteria exist in every corner of our living environment, so some bacteria are also pathogens of diseases, and some can be transmitted through mosquito bites and contacts, so some bacteria are extremely harmful to human society.

2. Beneficial bacteria: bacteria are not completely harmful, there are many bacteria in our intestines, most of which are beneficial, they can help gastrointestinal peristalsis and speed up the absorption of food.

3. Beneficial bacteria 2: In addition to promoting gastrointestinal absorption, some bacteria are also used in wastewater treatment and the manufacture of some antibiotics.

4. The history of bacteria: Since the development of human beings, they have reached a state of symbiosis with many bacteria. In many battles in ancient times, there were many stories about the antibodies that carried bacteria on one side and did not have antibodies on the other side, and in the end there were stories of the antibodies winning without a fight.

There are bacilli, spirochetes, cocci these names of bacteria (Helicobacter pylori, Streptococcus suis, Escherichia coli) are bacteria, but the word bacteria are not necessarily bacteria, for example: yeast (fungus) Specifically, it is difficult to see the name, so this must rely on the usual accumulation of knowledge, the following is the information I found on the Internet from elsewhere I hope it can be useful to the landlord, which contains **.

Fungal morphological structure.

Fungal morphology is divided into two types: unicellular and multicellular; Single-celled fungi are mainly yeasts and yeast-like fungi (e.g., cryptococcus, Candida) that are round or oval in shape. Multicellular fungi are composed of hyphae and spores, and the mycelium branches are intertwined to form mycelium (mycelium), and various spores are grown, this type of fungus is commonly called mold.

The cell structure of fungi is more complex than that of bacteria, and the cell wall lacks the peptidoglycan that makes up the bacterial cell wall, and its toughness mainly depends on the chitin composed of poly-N-acetyl glucose. It also contains dextran, mannan and protein, and some yeasts also contain lipids. Inside the cell there are more typical nuclear structures and organelles.

Structure of bacteria.

Although bacteria are small, they still have certain cellular structures and functions. There are various bacteria such as cell wall, cell membrane, cytoplasm and nucleoplasm, which are the basic structure of bacteria; Capsule, flagella, fimbria, and spores are unique structures that are only present in certain bacteria.

1. The basic structure of bacteria.

Cell Wall The cell wall is located in the outermost layer of the bacterial cell and is surrounded by the cell membrane. It is a membranous structure with a complex composition that varies with different bacteria. Gram staining can be used to divide bacteria into two main groups, namely Gram-positive bacteria and Gram-negative bacteria.

The common component of the cell wall of the two classes of bacteria is peptidoglycan, but each has its own special component.

1. Microorganisms are all microscopic organisms that cannot be seen or seen clearly by the naked eye, and the organisms with tiny individuals and simple structures can usually be seen clearly with optical microscopes and electron microscopes, collectively referred to as microorganisms. Whereas, bacteria conform to the characteristics of microorganisms.

2. Microorganisms include bacteria, viruses, molds, yeasts, etc. (However, some microorganisms are visible to the naked eye, such as mushrooms, reishi, etc., which belong to fungi.) Viruses are a class of "non-cellular organisms" made up of a handful of components such as nucleic acids and proteins, but they must depend on living cells for their survival.

According to the different environments present, it is divided into prokaryotic microorganisms, space microorganisms, fungal microorganisms, yeast microorganisms, marine microorganisms, etc.