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  2. Urban area - Wikipedia

    en.wikipedia.org/wiki/Urban_area

    For the Census of India 2011, the definition of urban area is a place having a minimum population of 5,000 of density 400 persons per square kilometre (1,000/sq mi) or higher, and 75% plus of the male working population employed in non-agricultural activities. Places administered by a municipal corporation, cantonment board or notified town ...

  3. Settlement hierarchy - Wikipedia

    en.wikipedia.org/wiki/Settlement_hierarchy

    At this density, there is ready access to more specialized advanced services (e.g. doctors, mechanics, colleges, etc.) due to economies of scale and economies of agglomeration. Regiopolis or City – a large city with a large population and many services. The population is less than one million but more than a quarter of a million people.

  4. Scientific method - Wikipedia

    en.wikipedia.org/wiki/Scientific_method

    The scientific method is an empirical method for acquiring knowledge that has characterized the development of science since at least the 17th century. The scientific method involves careful observation coupled with rigorous scepticism, because cognitive assumptions can distort the interpretation of the observation.

  5. Mutualism (biology) - Wikipedia

    en.wikipedia.org/wiki/Mutualism_(biology)

    Despite a different definition between mutualism and symbiosis, they have been largely used interchangeably in the past, and confusion on their use has persisted. [6] Mutualism plays a key part in ecology and evolution. For example, mutualistic interactions are vital for terrestrial ecosystem function as:

  6. Human overpopulation - Wikipedia

    en.wikipedia.org/wiki/Human_overpopulation

    Human overpopulation and continued population growth are also considered by some, including animal rights attorney Doris Lin and philosopher Steven Best, to be an animal rights issue, as more human activity means the destruction of animal habitats and more direct killing of animals. [165] [150]: 146

  7. Pastoralism - Wikipedia

    en.wikipedia.org/wiki/Pastoralism

    A catt of the Bakhtiari people, Chaharmahal and Bakhtiari Province, Iran Global map of pastoralism, its origins and historical development [1]. Pastoralism is a form of animal husbandry where domesticated animals (known as "livestock") are released onto large vegetated outdoor lands for grazing, historically by nomadic people who moved around with their herds. [2]

  8. Olmecs - Wikipedia

    en.wikipedia.org/wiki/Olmecs

    The Tres Zapotes heads, for example, were sculpted from basalt found at the summit of Cerro el Vigía, at the western end of the Tuxtlas. The San Lorenzo and La Venta heads, on the other hand, were probably carved from the basalt of Cerro Cintepec, on the southeastern side, [ 42 ] perhaps at the nearby Llano del Jicaro workshop, and dragged or ...

  9. Kinesis (biology) - Wikipedia

    en.wikipedia.org/wiki/Kinesis_(biology)

    Woodlouse activity decreases as humidity increases. Kinesis, like a taxis or tropism, is a movement or activity of a cell or an organism in response to a stimulus (such as gas exposure, light intensity or ambient temperature). Unlike taxis, the response to the stimulus provided is non-directional.

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