A bacterium is best described as an unicellular prokaryote.
A unicellular prokaryote
Can serve as decomposers
One-celled organisms that can be spherical, spiral, or rod-shaped and appearing singly or in chains, comprising the Schizomycota, a phylum of the kingdom Monera. various species are involved in fermentation, putrefaction, Infectious Diseases, or nitrogen fixation.
Bacteria (plural of bacterium) are microscopic single-celled organisms (prokaryotes) that reproduce by binary fission, i.e. one cell splits into two, the two cells split into four, etc., etc. The original Greek word (bakterion)meant "rod" or "staff" (like a walking stick) as the first ones discovered looked like a stick (see the picture above). They do not all look like sticks--they can also be round like balls or even spirals like a spring.
Bacteria are the most abundant organisms in the world and live in nearly every environment, including our own bodies. Those that live in nature help in recycling nutrients through decomposition and various other tasks that are too numerous to list. Without bacteria, we would not be able to survive--they are that important.
Most of them are harmless to, or even helpful for, the human body. In fact, you have more bacteria cells in your body than your own human cells. Those that live on or in our body are often called our "Natural Flora". There are something like 500 different species living in our bodies. They aid with digestion, produce vitamins, etc.
Other bacteria, the stuff we worry about, cause food poisoning (E. coli), strep throat, tetanus, pneumonia, and a host of serious illnesses (typhoid fever, cholera, leprosy, tuberculosis....) These bacteria are "pathogens" (can cause disease), or are said to be "virulent". Another service our natural flora (good bacteria) do for us is compete for resources (ie; they eat all the "food" and take up all the space) which can keep the virulent (bad) bacteria from reproducing enough to make us sick.
- Prokaryotic
- Usually single celled
- Cannot be seen with human eyes (microscopic)
- Can reproduce by itself (asexual)
- Can be found anywhere (eg. Air and body)
- Living
Bacteria have three different shapes. Spherical, rod-shaped, and spiral shaped. It has a cell envelope consisting of a plasma membrane and a cell wall. inside the cell envelope it has cytoplasm.
Bacteria (singular, bacterium) are a major group of living organisms.
A unicellular prokaryote
The plural of Bacterium is Bacteria.
A bacterium is a single-celled organism with cell walls but no nucleus or organelles.
Bacterium is plural for bacteria. Many bacteria.
IN The middle
A bacterium that needs oxygen is called an aerobic bacterium
An agent that causes disease, especially a living microorganism such as a bacterium
The morphology of a bacterium only describes its shape. Since many bacteria have the same shape, it's often impossible to distinguish similarly shaped bacteria based solely on this attribute. However, analyzing the physiology of a bacterium will provide much more useful information, as many bacteria have different patterns of substrate utilization.
Bacterium
IN The middle
One that used prokaryotes would be the best type of model for the bacterium
barman curls -2
bacterium can survive in extreme temperatures. except at temperatures to hot they die immediatly. at temperatures to cold they go into isolation and are inactive. at a warm humid climate it is the best situation for a bacterium.
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The peptidoglycan layer of the cell wall is thicker for a Gram-positive bacterium.