Saturday, July 24, 2010

Are bacteria living?

yes, of course they are! Bacteria are microscopic organisms whose single cells have neither a membrane-bounded nucleus nor other membrane-bounded organelles like mitochondria and chloroplasts. Another group of microbes, the archaea, meet these criteria but are so different from the bacteria in other ways that they must have had a long, independent evolutionary history since close to the dawn of life. Bacteria are among the oldest living organisms on Earth, and are very small. Because the bacteria structure is so minute, it can only be seen through a microscope. Bacteria is commonly found in the ground, water and in other living organisms. While some types of bacteria can cause diseases and become harmful to the environment, animals and humans, others offer benefits that we likely could not live without.





for more information, check out these cool websites below and DO NOT USE WIKIPEDIA[my suggestion~they usually have fake info, but its mainly up to you if you wanna use it or not] and good luck! ♥

Are bacteria living?
they meet the requirements of living...MRSGREN, movement, respiration, sensitivity, growth, reproduction, excretion and nutrition.





Viruses are a different story however
Reply:Yes, bacteria do meet all requirements for the currently accepted definition if life.





Virus, however, are not universally accepted as such.
Reply:Yes! Bacteria are living! They are a living thing and has a kingdom of its own.Bacteria can cause sickness and also can treat symptoms. Here is some tibits about bacteria. Good Luck![=





Bacteria (singular: bacterium) are unicellular microorganisms. They are typically a few micrometres long and have many shapes including spheres, rods, and spirals. The study of bacteria is bacteriology, a branch of microbiology. Bacteria are ubiquitous in every habitat on Earth, growing in soil, acidic hot springs, radioactive waste,[1] seawater, and deep in the earth's crust. Some bacteria can even survive in the extreme cold and vacuum of outer space. There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water; in all, there are approximately five nonillion (5×1030) bacteria in the world.[2] Bacteria are vital in recycling nutrients, and many important steps in nutrient cycles depend on bacteria, such as the fixation of nitrogen from the atmosphere. However, most of these bacteria have not been characterised, and only about half of the phyla of bacteria have species that can be cultured in the laboratory.[3]
Reply:Yes they are. They vast majority of them are not harmful. They are a unicellular microorganism, in other words a really small one cell "animal" that can only be seen under a microscope. Although they are living, it is the one area of science that doesn't have a group that complains about killing them (if there were, it would be a lot harder to find and purchase non bacterial hand soap).
Reply:yes....

ivy

No comments:

Post a Comment