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  2. Non-cellular life - Wikipedia

    en.wikipedia.org/wiki/Non-cellular_life

    Non-cellular life, also known as acellular life, is life that exists without a cellular structure for at least part of its life cycle. [1] Historically, most definitions of life postulated that an organism must be composed of one or more cells, [2] but, for some, this is no longer considered necessary, and modern criteria allow for forms of life based on other structural arrangements.

  3. Outline of life forms - Wikipedia

    en.wikipedia.org/wiki/Outline_of_life_forms

    A life form (also spelled life-form or lifeform) is an entity that is living, [1] [2] such as plants , animals , and fungi . It is estimated that more than 99% of all species that ever existed on Earth, amounting to over five billion species, [3] are extinct. [4] [5] Earth is the only celestial body known to harbor life forms. No form of ...

  4. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Mathematics is essential in the natural sciences, engineering, medicine, finance, computer science, and the social sciences. Although mathematics is extensively used for modeling phenomena, the fundamental truths of mathematics are independent of any scientific experimentation.

  5. Friedrich Wöhler - Wikipedia

    en.wikipedia.org/wiki/Friedrich_Wöhler

    It was the beginning of the end for one popular vitalist hypothesis, the idea that "organic" compounds could be made only by living things. In responding to Wöhler, Jöns Jakob Berzelius acknowledged that Wöhler's results were highly significant for the understanding of organic chemistry, calling the findings a "jewel" for Wöhler's "laurel ...

  6. Organism - Wikipedia

    en.wikipedia.org/wiki/Organism

    The term "organism" (from the Ancient Greek ὀργανισμός, derived from órganon, meaning ' instrument, implement, tool ', ' organ of sense ', or ' apprehension ') [2] [3] first appeared in the English language in the 1660s with the now-obsolete meaning of an organic structure or organization. [3]

  7. Division (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Division_(mathematics)

    This is denoted as 20 / 5 = 4, or ⁠ 20 / 5 ⁠ = 4. [2] In the example, 20 is the dividend, 5 is the divisor, and 4 is the quotient. Unlike the other basic operations, when dividing natural numbers there is sometimes a remainder that will not go evenly into the dividend; for example, 10 / 3 leaves a remainder of 1, as 10 is not a multiple of 3.

  8. Four-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Four-dimensional_space

    Four-dimensional space (4D) is the mathematical extension of the concept of three-dimensional space (3D). Three-dimensional space is the simplest possible abstraction of the observation that one needs only three numbers, called dimensions, to describe the sizes or locations of objects in the everyday world.

  9. List of The Magic School Bus episodes - Wikipedia

    en.wikipedia.org/wiki/List_of_The_Magic_School...

    With Arnold chewing gum, trying to break the school record for the longest chewing time, he swallows the gum, much to Wanda’s dismay. To Arnold’s surprise, he finally gets his wish by staying at school with their class pet, Liz, while the Friz takes the rest of the class on another weird field trip...without realizing it is his own digestive system.

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