Which of the following is not a beneficial use of bacteria?
Answers
Answer:
BACTERIA IS USE LESS
MARK THIS AS A BRAINEST ANSWER AND FOLLOW ME AND GIVE THANKS
Answer:
Characteristics of bacteria
Bacteria are microscopic prokaryotes. They can be found almost everywhere on Earth. Bacteria can live in or on almost every organism, both living and dead. They are much smaller than plant or animal cells. There are 3 shapes of bacteria. Bacilli, Cocci, Sprillia
Prokaryotic
Prokaryotes are unicellular organisms that do not have a nucleus or other membrane bound structure.
What are bacteria?
Bacteria are microscopic prokaryotes.
Archaea
Archaea are similar to bacteria and share many characteristics with them, including the lack of a membrane bound structure. It's chromosome is also circular like in bacteria.
There are some important differences b/w archaea and bacteria. The ribosomes of Archaea resemble the ribosomes of eukaryotes than those of bacteria.
Archaea also contain molecules in their plasma membranes that aren't found in any other organism.
Archaea can live in places where few organisms can survive, such as very warm areas or those with little oxygen. Both bacteria and archaea are important to life on earth.
Structure of bacteria
Bacteria consist of cytoplasm and DNA surrounded by a cell membrane and cell wall. Most bacteria have DNA that is one coiled circular chromosome. Some have a flagella that helps them move and the have cell walls. They also contain ribosomes. Many bacteria also have one or more small circular pieces of DNA called plasmids that are separate from its other DNA.
Some bacteria have specialized structures that help them survive, eg. the pneumonia bacteria has a thick covering, or capsule around its cell wall. This capsule protects the bacteria from drying out, and prevents white blood cells from surrounding and antibiotics from entering it.
Many bacteria have capsules with hairlike structures called Pili, that help the bacteria stick to surfaces.
Capsule
The capsule is a thick covering that protects it from drying out, not all bacteria have this. It also prevents white blood cells from surrounding and antibiotics from entering it.
Pili
Pili are hairlike structures on capsules that help the bacteria stick to surfaces.
Size and shape of bacteria
Bacteria are much smaller than plant or animal cells. Bacteria are generally only 1-5 micrometers wide. Bacteria generally have one of three shapes, Round or Sphere shaped, Rod shaped, and Spiral shaped.
What are the three basic shapes of bacteria.
The three basic shapes of bacteria are sphere, a rod, or a spiral.
Obtaining food and energy/bacteria
Some bacteria take in food and break it down and obtain energy. Many of these bacteria feed on dead organisms or organic waste.
Others take in their nutrients from living hosts. For example, bacteria that cause tooth decay live in dental plaque on teeth and feed on sugars in the foods you eat and the beverages you drink.
Some bacteria make their own food. These bacteria use light energy to make food, like most plants do. These bacteria live where there is lots of light, such as the surface of lakes and streams.
Other bacteria use energy from chemical reactions and make their own food. These bacteria live in places where there is no sunlight, such as the dark ocean floor.
How do bacteria obtain food?
Bacteria obtain food by photosynthesis, Parasitism, chemosynthesis, or by decomposition.
Anaerobic bacteria
Anaerobic bacteria do not need oxygen to survive.
Aerobic bacteria
Aerobic bacteria need oxygen to survive. Most bacteria in an environment are aerobic.
Movement of bacteria
Some bacteria are able to move around to find the resources they need to survive. These bacteria have special structures for movement.
Many bacteria have long whip like structures called flagella.
Others twist and spiral as they move.
Still other bacteria use their pili like grappling hooks or make thread like structures that enable them to push away from a surface.
Reproduction of bacteria
Bacteria reproduce asexually by fission. Fission is cell division that forms two genetically identical cells.
Fission can occur quickly as often as every 20 minutes under ideal conditions. Bacteria produced by fission are identical to the parent cell. However, genetic variation can be increased by a process called conjugation, two bacteria of the same species attach to each other and combine their genetic material.
DNA is transferred between the bacteria. This results in new combinations of genes, increasing genetic diversity.
New organisms are not produced during conjugation, so the process is not considered reproduction.
Fission
Fission is cell division that forms two genetically identical cells. Fission can occur quickly, as often as every 20 minutes .
Explanation:
HAPPY FRINDSHIP DAY FRIENDS