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  2. Cell (biology) - Wikipedia

    en.wikipedia.org/wiki/Cell_(biology)

    The cell is the basic structural and functional unit of all forms of life. Every cell consists of cytoplasm enclosed within a membrane; many cells contain organelles, each with a specific function. The term comes from the Latin word cellula meaning 'small room'. Most cells are only visible under a microscope.

  3. Cell biology - Wikipedia

    en.wikipedia.org/wiki/Cell_biology

    A cell is the basic unit of life that is responsible for the living and functioning of organisms. [3] Cell biology is the study of the structural and functional units of cells. Cell biology encompasses both prokaryotic and eukaryotic cells and has many subtopics which may include the study of cell metabolism , cell communication , cell cycle ...

  4. Cell theory - Wikipedia

    en.wikipedia.org/wiki/Cell_theory

    2. The cell is the most basic unit of life. Schleiden's theory of free cell formation through crystallization was refuted in the 1850s by Robert Remak, Rudolf Virchow, and Albert Kolliker. [5] In 1855, Rudolf Virchow added the third tenet to cell theory. In Latin, this tenet states Omnis cellula e cellula. This translated to: 3.

  5. Life - Wikipedia

    en.wikipedia.org/wiki/Life

    The definition of life has long been a challenge for scientists and philosophers. [2] [3] [4] This is partially because life is a process, not a substance. [5] [6] [7] This is complicated by a lack of knowledge of the characteristics of living entities, if any, that may have developed outside Earth.

  6. Doctors Say This Viral "Sleep Rule" Actually Works - AOL

    www.aol.com/lifestyle/doctors-viral-sleep-rule...

    TikTok is filled with tips and tricks — some legitimate, many not — to help you sleep better.One of the latest encourages people to follow a 10-3-2-1-0 sleep rule, which is actually not just ...

  7. Brian Thompson’s death recalls 2015 murders of reporter ...

    www.aol.com/brian-thompson-death-recalls-2015...

    Video of the terrifying incident ran on the station’s morning news program, capturing the sound of at least eight gunshots, then screams, and briefly showed Flanagan, 41, holding a gun.

  8. 2 men accused of operating drones 'dangerously close' to ...

    www.aol.com/2-men-arrested-hazardous-drone...

    Two men faced arraignment Monday in Boston, accused of conducting a "hazardous drone operation" too close to Logan International Airport as concerns over airspace safety and national security ...

  9. Last universal common ancestor - Wikipedia

    en.wikipedia.org/wiki/Last_universal_common_ancestor

    The LUCA probably existed at latest 3.6 billion years ago, and possibly as early as 4.3 billion years ago [2] or earlier. The nature of this point or stage of divergence remains a topic of research. All earlier forms of life preceding this divergence and all extant organisms are generally thought to share common ancestry. On the basis of a ...