Domain archaea: Bacteria-like prokaryotes
By: Tami Port MS
Archaea are prokaryotes that differ from bacteria and eukaryotes enough to be assigned to their own taxonomic domain. Here is a brief introduction to Archaeans.Until the 1970s, these single-celled microbes were thought to be bacteria, belonging to the domain Eubacteria. But Archaeans are now...
By: Tarek Musslimani
Cells in the body that are excitable and which communicate with each other through an action potential are cells of the nervous system that are called neurons. This is in addition to muscle cells which are also excitable and contract based on signaling using an...
By: Tarek Musslimani
Muscle cells are a unique type of cell in the human body due to their unique properties. They are the only cells in the body that are able to contract and relax. In addition, muscle cells along with neurons of the nervous system are the...
Understanding cell division
By: Zain Ahmed
The process of cell division is a very important one that can be simply defined as the process that involves the creation of new cells. There are plenty of reasons as to why cells in our bodies decide to divide and there are perhaps two...
Similarities and differences between plant and animal cells
By: Tami Port MS
Both plant and animal cells are eukaryotic, with many similarities, but there are also key differences between the cells of plants and animals. Here is a summary.Living things are made of cells, the most basic unit of life. All cells fall into one of...
Structure and function of the cell membrane
By: Jade Digirolamo
A cell is the base unit for life, containing the genetic information of the organism to which it contributes. The cell contains organelles (structures within the cell that carry out specific functions, much like organs within a body), cytoplasm, and a diverse assortment of proteins...
By: Perry McCarney
All multi-cellular lifeforms are made up of eukaryotic cells. Some single-cell lifeforms are also eukaryotic, but most are prokaryotic. All organisms on Earth, that are considered to be living, have cells that are either one or the other. The disease causing pathogens called viruses are...
Overview of cell biology
By: Effie Moore Salem
Cells are the smallest of living matter. They were discovered by Robert Hooke (1635-1703) who was a curious individual that wore many hats. As he was looking through a microscope at a piece of cork wood, he saw what reminded him of cells - little...
Eukaryotic animal cell structure
By: Tami Port MS
Animals and plants are eukaryotes, composed of cells that have a nucleus, and membrane-bound organelles. But animal cells have a few different features than plant cells.Unlike plants animals are heterotrophs, meaning that they must eat energy originally captured by plants and other autotrophs (photosynthetic...
Photosynthetic plant cell structure
By: Tami Port MS
Plants are eukaryotes, composed of cells that have a nucleus, and membrane-bound organelles. But plants have a few different features than animal cells. Here's a summary.Unlike animals, plants are photoautotrphs. “Photo” means that they can capture sunlight energy. “Autotroph” means that plants...

 

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