Navigation Links
Reproduction


Reproduction is the creation of one thing as a copy of, product of, or replacement for a similar thing, e.g. photocopying and the making of replicas.

It is perhaps most commonly used in the context of biological reproduction and sex:

  • Sexual reproduction is a biological process by which organisms create descendants through the combination of genetic material. These organisms have two different adult sexes, male and female.
  • Asexual reproduction is a biological process by which an organism creates a genetically similar copy of itself without the combination of genetic material with another individual. For example, the Hydra (invertebrates of the order Hydroidea) and yeast are able to reproduce by budding. These organisms do not have different sexes, and they are capable of "splitting" themselves into two or more parts and regrow their body parts. Some 'asexual' species, like hydra and jellyfish, may also sexually reproduce. Most plants are capable of vegetative reproduction. Other ways of asexual reproduction are binary fission, fragmentation and spore formation .

There are a wide range of reproductive strategies employed by different species.

Some animals, like the human (sexually mature after adolescence) and Northern Gannet (5-6 years), produce few offspring. Others reproduce quickly, but unless raised in an artificial environment, most offspring do not survive to adults. A rabbit (mature after 8 months) produces 10 - 30 offspring per year, a Nile Crocodile (15 years) produces 50, and a fruit fly (10-14 days) produces up to 900. Both strategies can be favoured by evolution: animals with few offspring can spend time nurturing and protecting them, hence greatly decreasing the need to reproduce; on the other hand, animals with many offspring do not need to spend parental energy on nurturing, allowing more energy to be devoted to survival and more breeding.

These two strategies are known as K-selection (few offspring) and r-selection (many offspring). Which strategy is favoured depends on a wide range of circumstances.


In Marxian economics, reproduction can refer to the worker's daily reproduction of his own labor capacity. This consists of the tasks of everyday existence — food preparation, laundry and so forth — that maintain him and his ability to show up at his job as required. Much of this domestic labor has historically been the responsibility of women; thus it is of particular interest in feminist economics.

See also

External link



Asexual Reproduction


'"/>


(Date:10/17/2014)... Why do male ... reproduce? And why are there two sexes anyway? These and ... the research journal Molecular Human Reproduction published today ... University Bielefeld has compiled this special issue on sperm competition. ... copulate with several males in quick succession – chimpanzees are ...
(Date:10/16/2014)... Washington land managers have a new synthesis of recent ... mixed-conifer (MMC) forests in the two states. , ... Eastern Oregon and Washington: A Synthesis of the Relevant ... general technical report published by the U.S. Forest Service,s ... a request from managers for a synthesis of the ...
(Date:10/16/2014)... , October 16, 2014 NXT-ID, Inc. (NASDAQ: ... "Company"), a biometric authentication company focused on the growing ... edge technologies including Wocket™, the Smart Wallet, at the ... FiRe is a leading global conference on the intersection ... by Mark Anderson , founder and publisher of ...
Breaking Biology News(10 mins):Sperm wars 2New report synthesizes best available science on management of moist mixed-conifer forests 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 3
... described in an article published this week in an ... the National Academy of Sciences (PNAS), the work ... instance, research shows that when different species directly compete ... survive. The work also demonstrates how, when given a ...
... 2009) How long will it take to develop Star ... is closing faster than many people may think. ... oxygen and pH will soon be an alternative to the ... to determine metabolic rate. The futuristic system, dubbed the Venus ...
... to quickly and accurately distinguish species based on a ... first time in the war against a major global ... Philadelphia-based JRS Biodiversity Foundation, is pioneering the use of ... Africa that spread lymphatic filariasis (LF), commonly known as ...
Cached Biology News:Darwin in a test tube 2Darwin in a test tube 3Star Trek-like technology offers noninvasive monitor for patients and athletes 2Star Trek-like technology offers noninvasive monitor for patients and athletes 3DNA barcoding of mosquito species deployed in bid to end elephantiasis 2DNA barcoding of mosquito species deployed in bid to end elephantiasis 3DNA barcoding of mosquito species deployed in bid to end elephantiasis 4
Other biology definitionOther Tags