Colony (biology)

In biology, a colony (from Latin colonia) means several individual organisms of the same species living closely together, usually for mutual benefit, such as stronger defences, the ability to attack bigger prey etc. Some insects (ants, for example) live only in colonies.

Colonies were probably the first step towards multicellular organisms during evolution. The difference between a multicellular organism and a colony is that individual organisms from a colony can, if separated, survive on their own, while cellss from a multicellular lifeform (e.g., liver cells) can not. Volvox is an example for the border between these two states.



In the News

An Initial Assessment of the Impact of the Earthquake and Tsunami of D
"Summarizes the information available until January 10, 2005 about the seismic shift that took place in the morning of December 26, 2004 in the Indian Ocean in the province of Aceh in Indonesia, and the ensuing tsunami that devastated some areas in East and Southeast Asia. It offers an initial assessment of the possible economic impact of the disaster."Opens directly into a PDF document. From the Asian Development Bank (ADB).

Hospital Death Rate Study Reveals Wide Variations And Stresses Importa
Hospital death rates can be reduced by employing more Registered Nurses and the routine use of care maps or protocols, according to a study in the latest UK-based Journal of Advanced Nursing.

Gene Protects Against Kidney Disease
Researchers have discovered a gene that protects us against a serious kidney disease. They report that mutations in the gene cause nephronopthisis (NPHP) in humans and mice. NPHP is a disease marked by kidney degeneration during childhood that leads to kidney failure requiring organ transplantation. The insights might help develop effective, noninvasive therapies.

How Cell Suicide Protects Plants From Infection
Researchers at Yale have identified a gene that regulates the major immune response in plants, programmed cell death (PCD), according to a recent report in the journal Cell.

Mystery Comet Explodes Into Brightness
A once-faint comet has made a sudden leap from obscurity to center stage. Comet 17P Holmes, now visible to northern hemisphere residents, increased its brightness by a factor of one million this week, going from magnitude 17 to 2. This makes it visible to the unaided eye as well as binoculars and telescopes, offering a unique viewing opportunity for sky watchers.

Older Breast Cancer Patients May Be Under-diagnosed And Under-treated
Elderly patients with breast cancer who received care in a community hospital setting may have been under-diagnosed, under-staged and under-treated, according to a report in the October issue of Archives of Surgery, one of the JAMA/Archives journals.

Hands-On With Sony's New Slim PSP 2
It's lighter. It's more colorful.



 Wired News sneaks an early peek at Sony's next-generation PlayStation Portable.

Bonobo Handshake: What Makes Our Chimp-like Cousins So Cooperative?
What's it like to work with relatives who think sex is like a handshake,who organize orgies with the neighbors, and firmly believe females should be in charge of everything? On September 11, a group of young researchers will head to the Congo to study our mysterious cousin, the bonobo.

Establishing Trust Online Is Critical For Online Communication Say NJI
Establishing trust quickly is the key to effective Internet communication, especially when it comes to teaching online, according to researchers at New Jersey Institute of Technology (NJIT).

Drug Discovery May Revolutionize Treatment Of Inflammatory Diseases An
If you found yourself on a run-away train, would you want to switch on the brakes? Scientists have found a way to turn on the brakes of a cell, and thus halt abnormal blood-cell growth in a range of inflammatory and autoimmune disorders and blood cancers.


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