-
Bacteria (scientific name: bacteria) are one of the main groups of organisms and belong to the bacterial domain. It is also the most abundant of all organisms, with an estimated total of about 51,030 individuals.
The individuals of bacteria are very small, and the smallest bacteria currently known are only micrometers long, so most of them can only be seen under a microscope;The world's largest bacteria, which can be seen directly with the naked eye, is millimeters in size, and is a bacterium called Thiobostobacterium Namibia.
Bacteria are generally single-celled, with a simple cell structure and lack a nucleus as well as membranous organelles, such as mitochondria and chloroplasts. Based on these characteristics, bacteria belong to prokaryotes. There is another group of prokaryotes called archaea, which is a new category created by scientists based on evolutionary relationships.
To distinguish them, these organisms are also called eubacteria. Archaeaa differ from eubacteria in terms of living environment, nutritional patterns, and genetics. The shapes of bacteria are quite varied, mainly globular, rod-shaped, and spiral-shaped.
Bacteria are widely distributed in soil and water, or live in symbiosis with other organisms. The human body also carries quite a lot of bacteria. It is estimated that the total number of bacterial cells in the human body and epidermis is about 10 times the total number of human cells.
In addition, there are also species that are distributed in extreme environments, such as hot springs, and even radioactive waste, which are classified as extremophiles, one of the most famous of which is the marine thermotrope, which scientists found in an undersea volcano in Italy. It can even grow on the space shuttle.
However, there are so many bacterial species that scientists have studied and named only a small fraction of them. Only about half of all the phylum under the bacterial domain can be cultured in the laboratory.
-
Bacteria help, in agriculture, can quickly artificially create artificial rain. Paved forest fires.
-
Hehehe, is there something something?
-
It's only tickling that you can get home.
-
Bacteria are one of the major groups of organisms and belong to the bacterial domain. It is also the most abundant of all organisms, with an estimated total of about 51,030 individuals. The shapes of bacteria are quite varied, mainly globular, rod-shaped, and spiral-shaped.
Bacteria also have a great influence on human activities. On the one hand, bacteria are the causative agents of many diseases, including tuberculosis, gonorrhea, anthrax, syphilis, plague, trachoma and other diseases.
However, bacteria are also often used by humans, such as the production of cheese, yogurt and wine, the manufacture of some antibiotics, and the treatment of wastewater. In the field of biotechnology, bacteria are also widely used.
-
1. Chaiupai 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 bacterial stools are quite diverse, mainly spherical, 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.
Hoga can pass through various means, such as contact, digestive tract, respiratory tract.
Insect bites and other diseases spread between normal human bodies, which are highly contagious 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 a lack of nucleus and cytoskeleton.
and membranous organelles, such as mitochondria.
and chloroplasts.
-
Hello, glad to answer for you. The knowledge of bacteria includes: bacteria are a single-celled registered microorganisms in the prokaryotic world, with many species, which can lead to a variety of diseases after invading the human body, and are easy to cause disease when the body's resistance is low, and the disease can be life-threatening in severe cases.
Bacteria are widely found in nature, Buhong people and animals, different types of bacteria have different oxygen needs, morphological characteristics are also different, according to the different forms, can be divided into three categories: cocci, bacilli, spirobacteria.
War Roar, Slam Dunk Liquid Only, Mobile City Alpha, Egg Boy Party, Flood Civilization, Ace Race >>>More
The sky was humid with a few scattered light rains. The breeze blows, the wheat fields have rippled, the green leaves ripple with the wind, and the willow branches on the roadside seem to be wrapped in a light veil. Two little girls about the first grade, singing nursery rhymes, innocently clapping their hands and legs and playing games. >>>More
The earliest is the oracle bone inscription, which is the Shang Dynasty people carved on the turtle shell or animal bones, the oracle bone inscription is the basic form of the structure of Chinese characters, is a relatively mature script, there are more than 1,000 oracle bone inscriptions that have been interpreted, and the history of China's writing can be examined from the Shang Dynasty.
There are groups with beautiful language, you use QQ to search and see.
I always feel like you've memorized it, and if you're saying that the other 6 kids are gone, I think it's probably the episode after the fight with Orangutan in Digimon Part 1, where the space-time distortion that brought Taichi and Ballmon back to the real world, and then Taichi found that only he was back. Suddenly, he watches TV and discovers that Digimon rexes have appeared all over the world, and only Hikaru (Taiyi's sister) and himself can see them. At this time, Ogamon also came to the real world, and Golemon evolved into Agumon and beat it back to the digital world. >>>More