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  2. Life - Wikipedia

    en.wikipedia.org/wiki/Life

    Life is a quality that distinguishes matter that has biological processes, such as signaling and self-sustaining processes, from matter that does not. It is defined descriptively by the capacity for homeostasis, organisation, metabolism, growth, adaptation, response to stimuli, and reproduction.

  3. Balance of nature - Wikipedia

    en.wikipedia.org/wiki/Balance_of_nature

    The balance of nature, also known as ecological balance, is a theory that proposes that ecological systems are usually in a stable equilibrium or homeostasis, which is to say that a small change (the size of a particular population, for example) will be corrected by some negative feedback that will bring the parameter back to its original "point of balance" with the rest of the system.

  4. Nature - Wikipedia

    en.wikipedia.org/wiki/Nature

    Over nine-tenths of the total biomass on Earth is plant life, on which animal life depends very heavily for its existence. [53] More than 2 million species of plant and animal life have been identified to date, [ 54 ] and estimates of the actual number of existing species range from several million to well over 50 million.

  5. Flight zone - Wikipedia

    en.wikipedia.org/wiki/Flight_zone

    An overstimulated animal will have a larger flight zone, for example an excited or scared animal. [24] A Cumulative Flight Zone is formed when animals move in a herd. In this situation the lead animal's and the following animals' Points of Balance, within the cumulative flight zone, must both be crossed to entice movement. [24]

  6. Sense of balance - Wikipedia

    en.wikipedia.org/wiki/Sense_of_balance

    The sense of balance or equilibrioception is the perception of balance and spatial orientation. [1] It helps prevent humans and nonhuman animals from falling over when standing or moving. Equilibrioception is the result of a number of sensory systems working together; the eyes ( visual system ), the inner ears ( vestibular system ), and the ...

  7. Osmoregulation - Wikipedia

    en.wikipedia.org/wiki/Osmoregulation

    Osmoregulation is the active regulation of the osmotic pressure of an organism's body fluids, detected by osmoreceptors, to maintain the homeostasis of the organism's water content; that is, it maintains the fluid balance and the concentration of electrolytes (salts in solution which in this case is represented by body fluid) to keep the body fluids from becoming too diluted or concentrated.

  8. Zoology - Wikipedia

    en.wikipedia.org/wiki/Zoology

    Zoology (UK: / z u ˈ ɒ l ə dʒ i / zoo-OL-ə-jee, US: / z oʊ ˈ ɒ l ə dʒ i / zoh-OL-ə-jee) [1] is the scientific study of animals.Its studies include the structure, embryology, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems.

  9. Gracefulness - Wikipedia

    en.wikipedia.org/wiki/Gracefulness

    Gracefulness, or being graceful, is the physical characteristic of displaying "pretty agility", in the form of elegant movement, poise, or balance. The etymological root of grace is the Latin word gratia from gratus, meaning pleasing. [1] Gracefulness has been described by reference to its being aesthetically pleasing. For example: