Search results
Results from the WOW.Com Content Network
Light micrograph of a moss's leaf cells at 400X magnification. The following outline is provided as an overview of and topical guide to cell biology: . Cell biology – A branch of biology that includes study of cells regarding their physiological properties, structure, and function; the organelles they contain; interactions with their environment; and their life cycle, division, and death.
This template's documentation is missing, inadequate, or does not accurately describe its functionality or the parameters in its code. Please help to expand and improve it . Editors can experiment in this template's sandbox ( create | mirror ) and testcases ( create ) pages.
In animals, the plasma membrane is the outer boundary of the cell, while in plants and prokaryotes it is usually covered by a cell wall. This membrane serves to separate and protect a cell from its surrounding environment and is made mostly from a double layer of phospholipids , which are amphiphilic (partly hydrophobic and partly hydrophilic ).
[[Category:Animal templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Animal templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
Organelles are small unique structures of a cell that perform specialized tasks. They are often suspended in the cytosol , or attached to the plasma membrane . Organelles were historically identified through the use of some form of microscopy and by cell fractionation .
Several processes are known to have developed for organelle biogenesis. These can range from de novo synthesis to the copying of a template organelle; the formation of an organelle 'from scratch' and using a preexisting organelle as a template to manufacture an organelle, respectively. The distinct structures of each organelle are thought to be ...
[16] [15] Division of the macronucleus occurs in most ciliate species, apart from those in class Karyorelictea, whose macronuclei are replaced every time the cell divides. [ 17 ] Macronuclear division is accomplished by amitosis , and the segregation of the chromosomes occurs by a process whose mechanism is unknown. [ 15 ]
[10] [11] The taxa "animal kingdom" (or kingdom Animalia) and "plant kingdom" (or kingdom Plantae) remain in use by some modern evolutionary biologists. The initial targets of Cavalier-Smith's classification, the protozoa were classified as members of the animal kingdom, [ 12 ] and many algae were regarded as part of the plant kingdom.