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  2. Biotic - Wikipedia

    en.wikipedia.org/wiki/Biotic

    Biotics describe living or once living components of a community; for example organisms, such as animals and plants. Biotic may refer to: . Life, the condition of living organisms

  3. Ecosystem - Wikipedia

    en.wikipedia.org/wiki/Ecosystem

    An ecosystem (or ecological system) is a system formed by organisms in interaction with their environment. [2]: 458 The biotic and abiotic components are linked together through nutrient cycles and energy flows.

  4. Biotic stress - Wikipedia

    en.wikipedia.org/wiki/Biotic_stress

    Biotic stress is stress that occurs as a result of damage done to an organism by other living organisms, such as bacteria, viruses, fungi, parasites, beneficial and harmful insects, weeds, and cultivated or native plants. [1]

  5. River ecosystem - Wikipedia

    en.wikipedia.org/wiki/River_ecosystem

    This stream operating together with its environment can be thought of as forming a river ecosystem. River ecosystems are flowing waters that drain the landscape, and include the biotic (living) interactions amongst plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions of its many parts.

  6. Earth - Wikipedia

    en.wikipedia.org/wiki/Earth

    Earth is the third planet from the Sun and the only astronomical object known to harbor life. [23] This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water.

  7. Tree - Wikipedia

    en.wikipedia.org/wiki/Tree

    Common ash (Fraxinus excelsior), a deciduous broad-leaved tree European larch (Larix decidua), a coniferous tree which is also deciduousIn botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves.

  8. Tundra - Wikipedia

    en.wikipedia.org/wiki/Tundra

    In physical geography, tundra (/ ˈ t ʌ n d r ə, ˈ t ʊ n-/) is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. There are three regions and associated types of tundra: Arctic, [2] Alpine, [2] and Antarctic.

  9. Carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide

    The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbon–oxygen bond in carbon dioxide is 116.3 pm, noticeably shorter than the roughly 140 pm length of a typical single C–O bond, and shorter than most other C–O multiply bonded functional groups such as carbonyls. [19]