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This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.
Dec 18, 2016 · Biology Dictionary provides definition, examples and quiz for common biology terms, including molecular biology, cell biology, genetics, ecology and more!
- Bacteria Definition
- Evolution of Bacteria
- Bacteria Characteristics
- Bacteria Shapes
- Types of Bacteria
- Examples of Bacteria
- Related Biology Terms
- Quiz
Bacteria are single-celled microorganisms with prokaryotic cells, which are single cells that do not have organelles or a true nucleus and are less complex than eukaryotic cells. Bacteria with a capital B refers to the domain Bacteria, one of the three domains of life. The other two domains of life are Archaea, members of which are also single-cell...
Bacteria first arose on Earth approximately 4 billion years ago, and they were the first forms of life on Earth. For 3 billion years, bacteria and archaea were the most prevalent kinds of organisms on Earth. Multicellular eukaryotes did not appear until around 1.6-2 billion years ago. Eukaryotic cells, which make up all protists, fungi, animals, an...
Bacteria are single-celled organisms. They lack organelles such as chloroplasts and mitochondria, and they do not have the true nucleus found in eukaryotic cells. Instead, their DNA, a double strand that is continuous and circular, is located in a nucleoid. The nucleoid is an irregularly shaped region that does not have a nuclear membrane. Bacteria...
Bacteria come in a myriad of shapes. The three main shapes of bacteria are coccus, spiral, and bacillus. Bacteria can also be other shapes such as filamentous (long and thin), square, star-shaped, and stalked. This diagram depicts the numerous shapes of bacteria.
The cell wall also makes Gram staining possible. Gram staining is a method of staining bacteria involving crystal violet dye, iodine, and the counterstain safranin. Many bacteria can be classified into one of two types: gram-positive, which show the stain and appear violet in color under a microscope, and gram-negative, which only show the counters...
Escherichia coli is one example of a common species of bacteria. It is bacillus-shaped and found naturally in the intestines of many animals including humans, where it produces vitamin K and b-complex vitamins. E. coli is also often used in laboratory research since it reproduces quickly and is hardy. Most strains of E. coli are harmless to humans,...
Prokaryote– An organism that has a simple prokaryotic cell; bacteria and archaea are prokaryotes.Binary fission– The method by which bacteria reproduce asexually through dividing.Probiotic– A bacterium that helps maintain a healthy digestive tract when consumed.Horizontal gene transfer– Gene transfer between two organisms that are not parent and offspring.1. How do bacteria reproduce? A. Sexual reproduction B. Horizontal gene transfer C. Binary fission D.Mitosis 2. Which is not one of the three main shapes of bacteria? A. Coccus B. Bacillus C. Spiral D.Star 3. When did bacteria first begin to exist on Earth? A. 4 billion years ago B. 2 billion years ago C. 1.6 billion years ago D.1 billion years ago
Fully revised and updated, the sixth edition of this dictionary provides comprehensive coverage of biology, biophysics, and biochemistry, as well as key terms from medicine and palaeontology.
Nov 28, 2022 · Abstract. In medicine, inflammation is a fuzzy, overused word first coined by the Romans, the intended meaning and precise definition of which varies according to the person and the clinical context.
- Bryan Oronsky, Scott Caroen, Tony Reid
- Int J Mol Sci. 2022 Dec; 23(23): 14905.
- 10.3390/ijms232314905
- 2022/12
1 day ago · Fully revised and updated for the seventh edition, this market-leading dictionary is the perfect guide for anyone studying biology, either at school or university. Clear and concise entries provide comprehensive coverage of biology, biophysics, and biochemistry.
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noun. the study of living organisms, including their structure, functioning, evolution, distribution, and interrelationships. the structure, functioning, etc, of a particular organism or group of organisms. the animal and plant life of a particular region.
