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:2/8/2017)... 7, 2017 Report Highlights The ... from $8.3 billion in 2016 at a compound annual ... Report Includes - An overview of the global ... with data from 2015 and 2016, and projections of ... of the market on the basis of product type, ...
(Date:2/6/2017)... According to Acuity Market Intelligence, ongoing ... to continue to embrace biometric and digital identification ... Border Control (ABC) eGates and 1436 Automated Passport ... 163 ports of entry across the globe. Deployments ... combined CAGR of 37%. APC Kiosks reached 75% ...
(Date:2/2/2017)... 2017  EyeLock LLC, a market leader of iris-based ... " What You Should Know About Biometrics in the ... authenticity is a growing concern. In traditional schemes, cryptography ... traditional authentication schemes such as username/password suffer from inherent ... offers an elegant solution to the problem of high-security ...
Breaking Biology News(10 mins):
Other biology definition