Water is a nonliving natural thing. Though water can move and change in appearance and shape, it requires external forces to do so, such as forces of nature or human intervention. It also does not produce waste and it ca... More »

During their life span, most viruses are both living and non-living organisms. Whether they are living or non-living depends on if they have found a host. More »

Biology-Online.org defines a non-living object as being "dead or not living" or an "inanimate body or object." Rocks, firewood and cars are a few examples of non-living objects. More »

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Specialist species are animals that are adapted to a particular thing, such as a specific food or habitat. An example of a specialist species is a tiger salamander, which requires a consistent wetland habitat to breed an... More »

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A homologous trait shared between two species is actually the same thing as synapomorphy, but synapomorphy is the term favored in modern biology. Both terms refer to similarities between different species that derive fro... More »

Some people’s sweat contains more salt than others, particularly people who drink more water and eat a lower-salt diet, states RunnersWorld. Individuals can replace the salt lost through sweating by adding more salt to t... More »

Plant cell vacuoles serve the same vital storage functions for nutrients, water and wastes as those in animal cells but are much larger because they also provide structural stiffness in combination with the plant's cell ... More »