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  2. Protocell - Wikipedia

    en.wikipedia.org/wiki/Protocell

    Therefore, a boundary is needed to separate life processes from non-living matter. [20] This fundamental necessity is underpinned by the universality of the cell membrane which is the only cellular structure found in all organisms on Earth.

  3. Separation of content and presentation - Wikipedia

    en.wikipedia.org/wiki/Separation_of_content_and...

    Under this principle, visual and design aspects (presentation and style) are separated from the core material and structure (content) of a document. [ 1 ] [ 2 ] [ 3 ] A typical analogy used to explain this principle is the distinction between the human skeleton (as the structural component) and human flesh (as the visual component) which makes ...

  4. 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.

  5. 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.

  6. Separation process - Wikipedia

    en.wikipedia.org/wiki/Separation_process

    A separation process is a method that converts a mixture or a solution of chemical substances into two or more distinct product mixtures, [1] a scientific process of separating two or more substances in order to obtain purity. At least one product mixture from the separation is enriched in one or more of the source mixture's constituents.

  7. Semiconservative replication - Wikipedia

    en.wikipedia.org/wiki/Semiconservative_replication

    DNA replication occurs on multiple origins of replication along the DNA template strands. As the DNA double helix is unwound by helicase, replication occurs separately on each template strand in antiparallel directions. This process is known as semi-conservative replication because two copies of the original DNA molecule are produced, each copy ...

  8. Quark–gluon plasma - Wikipedia

    en.wikipedia.org/wiki/Quark–gluon_plasma

    A new record breaking temperature was set by ALICE: A Large Ion Collider Experiment at CERN in August 2012 in the ranges of 5.5 trillion (5.5 × 10 12) kelvin as claimed in their Nature PR. [ 86 ] The formation of a quark–gluon plasma occurs as a result of a strong interaction between the partons (quarks, gluons) that make up the nucleons of ...

  9. Biological roles of the elements - Wikipedia

    en.wikipedia.org/wiki/Biological_roles_of_the...

    A large fraction of the chemical elements that occur naturally on the Earth's surface are essential to the structure and metabolism of living things. Four of these elements (hydrogen, carbon, nitrogen, and oxygen) are essential to every living thing and collectively make up 99% of the mass of protoplasm. [1]