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  2. Biogeochemical cycle - Wikipedia

    en.wikipedia.org/wiki/Biogeochemical_cycle

    The living factors of the planet can be referred to collectively as the biosphere. All the nutrients — such as carbon , nitrogen , oxygen , phosphorus , and sulfur — used in ecosystems by living organisms are a part of a closed system ; therefore, these chemicals are recycled instead of being lost and replenished constantly such as in an ...

  3. Habitat - Wikipedia

    en.wikipedia.org/wiki/Habitat

    The physical factors may include (for example): soil, moisture, range of temperature, and light intensity. Biotic factors include the availability of food and the presence or absence of predators. Every species has particular habitat requirements, habitat generalist species are able to thrive in a wide array of environmental conditions while ...

  4. Triangular number - Wikipedia

    en.wikipedia.org/wiki/Triangular_number

    By analogy with the factorial function, a product whose factors are the integers from 1 to n, Donald Knuth proposed the name Termial function, [18] with the notation n? for the sum whose terms are the integers from 1 to n (the n th triangular number).

  5. Factor analysis - Wikipedia

    en.wikipedia.org/wiki/Factor_analysis

    The factor model must then be rotated for analysis. [4] Canonical factor analysis, also called Rao's canonical factoring, is a different method of computing the same model as PCA, which uses the principal axis method. Canonical factor analysis seeks factors that have the highest canonical correlation with the observed variables.

  6. Divergent evolution - Wikipedia

    en.wikipedia.org/wiki/Divergent_evolution

    Divergent evolution or divergent selection is the accumulation of differences between closely related populations within a species, sometimes leading to speciation. ...

  7. Rainforest - Wikipedia

    en.wikipedia.org/wiki/Rainforest

    No rainforest today can be considered to be undisturbed. [33] Human-induced deforestation plays a significant role in causing rainforests to release carbon dioxide, [ 34 ] [ 35 ] [ 36 ] as do other factors, whether human-induced or natural, which result in tree death, such as burning and drought. [ 37 ]

  8. Reading - Wikipedia

    en.wikipedia.org/wiki/Reading

    Reading is the process of taking in the sense or meaning of symbols, often specifically those of a written language, by means of sight or touch. [1] [2] [3] [4]For educators and researchers, reading is a multifaceted process involving such areas as word recognition, orthography (spelling), alphabetics, phonics, phonemic awareness, vocabulary, comprehension, fluency, and motivation.

  9. Adult development - Wikipedia

    en.wikipedia.org/wiki/Adult_development

    Adult development encompasses the changes that occur in biological and psychological domains of human life from the end of adolescence until the end of one's life. Changes occur at the cellular level and are partially explained by biological theories of adult development and aging. [1]