Definition of Bacteria, Types, Characteristics and Role for Human Life

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Definition of Bacteria, Types, Characteristics and Role for Human Life - On this earth there are many types of living things ranging from small to large. Lots of organisms that spread around us.

These organisms have a positive role if we use them properly and have a negative role if we ignore them. These organisms have spread to various places even though we have cleaned them very cleanly.

Definition of Bacteria, Types, Characteristics and Role for Human Life

These organisms are called bacteria. These bacteria are in every object we touch, in our bodies, and everywhere. To get to know bacteria better, see the explanation below:

Definition of Bacteria

The definition of bacteria is a single-celled or unicellular organism, prokaryotes or prokaryotes, microscopic or very small in size and does not have chlorophyll. The word bacteria comes from the word "bacterium" in Latin.

Bacteria have many species reaching hundreds of thousands of them. Bacteria are the most numerous organisms on earth. They are in the soil, on the ground, in the air, in the water, in other organisms and many more. Bacteria grow and develop according to pH, temperature, salt content, chemicals, metabolic substances and nutrient sources.

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The first bacteria discovered by scientists is named Anthony Van Leewenhoek. Then it was introduced in the form of a picture book of bacteria in 1684. The science that studies bacteria is bacteriology.

Type of Bacteria

Types of bacteria are separated based on how they can get food and how they get oxygen. Grouping based on how they forage are as follows:

  1. Heterotrophic Bacteria are bacteria that eat organic compounds from other organisms. For heterotof bacteria are divided into 2, namely parasitic bacteria and sprophy bacteria.
  2. Autotrophic Bacteria are bacteria that can make food for themselves. These bacteria are divided into 2, namely chemoautotrophic bacteria and photoautotrophic bacteria.

Grouping based on how they obtain oxygen is as follows:

  1. Aerobic Bacteria are bacteria that obtain energy by capturing free oxygen. And these bacteria are nitrosomonas, nitrosococcus, and nitrobacter.
  2. Anaerobic Bacteria is a bacterium that in obtaining energy does not require free oxygen. The energy comes from the process of overhauling organic compounds without the use of oxygen in the process, the process is called fermentation. These bacteria are divided into 2 namely obligate anaerobes and facultative anaerobes.

Characteristics of Bacteria

Other organisms to be called bacteria must have the special characteristics needed. These special features are:

  1. Generally do not have chlorophyll in the body.
  2. Has a free life like a parasite or pathogen.
  3. Has a variety of shapes.
  4. Its body is small, namely 1 to 5 microns.
  5. Do not have a membrane on the nucleus of cells or prokaryotes.
  6. Bacteria are generally unicellular or have one cell.
  7. Has a peptidoglycan cell wall in extreme environments and cosmoploites contain peptidoglycan.
Complete Definition, Types, Characteristics And Role Of Bacteria For Human Life

Role for Life

Bacteria also have a role in life in this world. Each of these roles has its own impact. Some have a positive impact but some have a negative impact. Included in the positive impacts are:

  1. Helps in soil enrichment by producing nitrates.
  2. As a decomposer leftovers from living things.
  3. Helping to make fermentation in food or drink.
  4. As a producer of antibiotic drugs.
  5. Can decompose waste into energy.
  6. Assist in the manufacture of chemicals and others.

The negative impacts that can be are as follows:

  1. Can be a source of disease for living things.
  2. Making the food or drink that we have rotten.
  3. Can damage planted plants with disease attacks.
  4. Can cause a foul odor in the decomposition process.
  5. When humans are dirty it will cause odor on their bodies.

Here's an explanation about Definition of Bacteria, Types, Characteristics and Role for Human Life which has been explained above. Bacteria are organisms that we cannot avoid being on this earth, because wherever we are, there must be bacteria. We can use bacteria to be able to continue life and can have a positive impact on living things if used properly. Hope it is useful.

Also read:

  • Bacteria and Their Role: Types, Beneficial and Harmful Roles
  • Definition of Binary Fission and Its Phases in Bacteria (Complete)
  • Definition of Family, Characteristics, Functions, Kinds, Duties, Roles of the Family
  • Vacuoles Are: Characteristics, Functions, Structures and Types
  • Definition of Abiotic and Abiotic Components (Complete)
  • Definition of Vaccine, Function, Type and Administration System (Complete)

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