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Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, ...
A species that occurs naturally in an area, and has not been introduced by humans either intentionally or unintentionally (Allaby 2005). In North America, a species established before the year 500 (Jeschke and Strayer 2005) Native weed (invasive native) A species that is native to an area or bioregion that has increased in number dramatically.
Lava tube – Natural conduit through which lava flows beneath the solid surface; Lavaka – Type of gully, formed via groundwater sapping; Levee – Ridge or wall to hold back water, natural; Limestone pavement – Natural karst landform consisting of a flat, incised surface of exposed limestone; Loess – Sediment of accumulated wind-blown dust
A natural product is a natural compound or substance produced by a living organism—that is, found in nature. [2] [3] In the broadest sense, natural products include ...
The value of natural resources to human society is poorly reflected in market prices because except for labour costs the natural resources are available free of charge. [dubious – discuss] This distorts market pricing of natural resources and at the same time leads to underinvestment in our natural assets. The annual global cost of public ...
A coal mine in Wyoming, United States. Coal, produced over millions of years, is a finite and non-renewable resource on a human time scale.. A non-renewable resource (also called a finite resource) is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption. [1]
A natural phenomenon is an observable event which is not man-made. Examples include: sunrise, weather, fog, thunder, tornadoes; biological processes, decomposition, germination; physical processes, wave propagation, erosion; tidal flow, and natural disasters such as electromagnetic pulses, volcanic eruptions, hurricanes and earthquakes. [1] [2]
Anthropic rock is synthetic or restructured rock formed by human activity. Concrete is recognized as a human-made rock constituted of natural and processed rock and having been developed since Ancient Rome. [23] Rock can also be modified with other substances to develop new forms, such as epoxy granite. [24]