Question

Explain bacillus.

Answer 1

One of the very first organisms to evolve on earth was probably a unicellular organism, similar to modern bacteria. Bacteria are observed as one of the oldest forms of life on earth. Bacteria are unicellular organisms, which belong to the prokaryotic group. Here organisms don’t have a few organelles and a true nucleus. They are single-celled microorganisms with the absence of the nucleus and other cell organelles and are classified as prokaryotic organisms. They are microscopic, not visible with the naked eye.

Complete step by step answer:
Bacillus is a genus of Gram-positive bacteria. They are rod-shaped and endospore-forming bacteria. They can diminish themselves to oval endospores and can last in this dormant state for years. Some of their characteristics are listed below:
Only one endospore is found per cell.
Their spores are resistant to heat, cold, radiation, desiccation, and disinfectants.
They can be aerobic or (under some conditions) anaerobic.
They are usually found in soil and water.
These bacteria frequently occur in chains.
They are mostly fermentative and most are motile also.
The cell wall of Bacillus is a constitution on the outer side of the cell, which forms the second barrier between the bacterium and the environment.
The cell wall is built of teichoic acids and teichuronic acids.

Note: The largest known Bacillus species, B. megaterium, is about 1.5 micrometers across by 4 micrometers long.
Some types of Bacillus bacteria are dangerous to humans, plants, or other organisms. For example, B. cereus sometimes causes spoilage in canned foods and food poisoning of short duration.
Medically useful antibiotics are produced by B. subtilis.