Nitrosomonas and iron bacteria are the most common examples of chemoautotrophic bacteria because they are able to produce energy through a chemical process, according to Dr. John W. Kimball. These organisms are unique because they are able to produce the energy they need without photosynthesis.Know More
Most organisms on the earth need photosynthesis to survive and to produce the energy they need to function. Chemoautotrophic organisms do not need these processes because they are able to oxidize the electron molecules that they take in from their own internal environments in order to survive. They do not live on anything other than molecules and are able to sustain themselves through the use of these electrons.
Chemoautotrophic bacteria are at the bottom of the food chain. They do not eat anything or take anything in other than at a molecular level and are essential to the survival of small sea creatures. Chemoautotrophic bacteria are responsible for methane, hydrogen gas and carbon monoxide that are found in the ocean. These gasses are a result of what happens when the chemoautotrophs convert the electrons to energy. Some chemoautotrophs, like the iron bacteria, are responsible for everyday things like the rust-colored stains that are often found on the inside of a toilet tank.Learn more about Biology
The purpose of streaking bacteria for isolation is to create a region in which the bacteria are so dilute that when each bacterium touches the surface of the agar, it is far enough away from other cells so that an isolated colony can develop. This allows for isolation of multiple organisms.Full Answer >
Freezing food or other items does not kill all the bacteria or other microorganisms present. Freezing temperatures may kill some bacteria, and the cold prevents bacteria from growing and multiplying as long as the temperature remains below freezing; however, bringing the food back to room temperature allows the bacteria to wake up and begin multiplying once more.Full Answer >
Items covered in a dichotomous key include whether bacteria are Gram positive or negative, catalase positive or negative, have nitrate enzymes, and contain the enzyme coagulase. The key is a set of questions that when complete help identify the bacteria. Each question requires completion of a certain test.Full Answer >
Archaea, bacteria, Protista, fungi, viruses and microbial mergers are divisions that contain microorganisms. Most microorganisms are single-celled organisms. Baker's yeast and fission yeast are unicellular microorganisms.Full Answer >