By: Darian Peters
Bacteria are single-celled microorganisms that can come in a vast number of species and with a variety of lifestyles. Some of them are free living, not requiring other organisms for their survival, and existing in everything from the soil and fresh water to extreme environments...
By: Darian Peters
Bacteria are a type of single-celled microorganism. They can come in many different species and in several very different forms that have implications for how they live and how they interact with other organisms. One of these types is the pathogenic bacteria, which are harmful...
Focusing and finding specimens with a microscope
By: Tami Port MS
Students new to using a microscope often get frustrated when trying to view objects, particularly at higher magnifications. Here's how to do it sans the aggravation. The magnification of a compound microscope is the result of two sets of lenses: the objective lenses, and the...
By: Tami Port MS
A compound light microscope is a scientific tool typically used to look at very small living things, such as stained plant and animal cells, and even minute bacteria. This type of scope has a built in light source and two sets of lenses. * The...
What is a eukaryotic cell?
By: Wendy R.
A eukaryotic cell is one which contains complex structures bound together by a cell membrane. Large species such as humans, animals and plants and fungi have eukaryotic cells. Eukaryotic cells contain a membrane bound nucleus, this nucleus is what sets eukaryotes apart from prokaryotes. In...
By: Wendy R.
A compound light microscope is a microscope that uses both light and multiple magnifying lenses in order to provide a better view of specimens. The light of a compound microscope is located below the stage that the specimen you are looking at is put on...
By: Tami Port MS
Living cells are known as vegetative cells; the smallest unit of life that is like a tiny factory that is constantly working to live, grow and reproduce. But vegetative cells are vulnerable to damage from many environmental forces. A few types of cells have a...
By: Tami Port MS
The human mouth contains millions of bacteria, most of which do not cause a person any great harm. But the bacteria that naturally exist in the mouth can build up into a biofilm (living layer) called plaque if a person does not practice good oral...
By: Joshua Horn - 257112
Cyanobacteria are bacteria that obtain their energy from photosynthesis. Also known as blue-green algae or Cyanophyta, they make up a huge part of the marine ecosystem and are assumed to have been responsible for the Earth's shift to an oxygen rich atmosphere and the extinction...
What are Gram-positive Bacteria? Distinction Between Gram+ and Gram- Microbes
By: Tami Port MS
All bacteria (the domain Eubacteria) and bacteria-like Archaea, are prokaryotes. Prokaryotic cells are simpler than the eukaryotic cells of the human body. One of the most striking distinctions is that prokaryotes lack a membrane bound nucleus. Their genetic material is naked within the cytoplasm; their...

 

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