@iggitsmee_erikaa: #fypage #semuaorang

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Tuesday 13 October 2026 07:11:07 GMT
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Cell theory is a foundational biological principle stating that all living organisms are composed of cells, that cells are the basic units of structure and function in life, and that all cells come from pre-existing cells. Core Tenets of Classical Cell Theory • All Living Organisms are Made of Cells: Every plant, animal, fungus, and microorganism is either unicellular (single-celled like an Amoeba) or multicellular (composed of trillions of specialized cells like a human or tree). • The Cell is the Basic Unit of Life: Cells are the smallest independent entities that can perform all characteristics of life, including metabolism, growth, response to stimuli, and reproduction. • Cells Arise Only from Pre-existing Cells (Omnis cellula e cellula): New cells do not spontaneously generate from non-living matter; they are produced through the division of existing cells. Modern Additions to Cell Theory As science and microscopy advanced, the theory expanded to include cellular chemistry and genetics: • Hereditary Information is Passed Down: Genetic material (DNA) is passed from parent cells to daughter cells during division. • Basic Chemical Composition is Shared: All cells across different species have a remarkably similar chemical and biochemical composition (proteins, lipids, nucleic acids, and carbohydrates). • Energy Flow Occurs Within Cells: Metabolic and biochemical energy processes (such as cellular respiration and photosynthesis) take place inside cells. Key Historical Milestones Robert Hooke (1665): Examined a thin slice of cork under a primitive microscope and coined the term cell after observing small room-like compartments. Antonie van Leeuwenhoek (1670s): Built high-powered single-lens microscopes and discovered living microscopic organisms (which he called animalcules), bacteria, and blood cells. Matthias Schleiden (1838): A German botanist who concluded that all plant tissues are composed of cells. Theodor Schwann (1839): A German zoologist who extended Schleiden's findings to animals, concluding that all animal tissues are also made of cells. Rudolf Virchow (1855/1858): Formulated the famous maxim omnis cellula e cellula (
Cell theory is a foundational biological principle stating that all living organisms are composed of cells, that cells are the basic units of structure and function in life, and that all cells come from pre-existing cells. Core Tenets of Classical Cell Theory • All Living Organisms are Made of Cells: Every plant, animal, fungus, and microorganism is either unicellular (single-celled like an Amoeba) or multicellular (composed of trillions of specialized cells like a human or tree). • The Cell is the Basic Unit of Life: Cells are the smallest independent entities that can perform all characteristics of life, including metabolism, growth, response to stimuli, and reproduction. • Cells Arise Only from Pre-existing Cells (Omnis cellula e cellula): New cells do not spontaneously generate from non-living matter; they are produced through the division of existing cells. Modern Additions to Cell Theory As science and microscopy advanced, the theory expanded to include cellular chemistry and genetics: • Hereditary Information is Passed Down: Genetic material (DNA) is passed from parent cells to daughter cells during division. • Basic Chemical Composition is Shared: All cells across different species have a remarkably similar chemical and biochemical composition (proteins, lipids, nucleic acids, and carbohydrates). • Energy Flow Occurs Within Cells: Metabolic and biochemical energy processes (such as cellular respiration and photosynthesis) take place inside cells. Key Historical Milestones Robert Hooke (1665): Examined a thin slice of cork under a primitive microscope and coined the term cell after observing small room-like compartments. Antonie van Leeuwenhoek (1670s): Built high-powered single-lens microscopes and discovered living microscopic organisms (which he called animalcules), bacteria, and blood cells. Matthias Schleiden (1838): A German botanist who concluded that all plant tissues are composed of cells. Theodor Schwann (1839): A German zoologist who extended Schleiden's findings to animals, concluding that all animal tissues are also made of cells. Rudolf Virchow (1855/1858): Formulated the famous maxim omnis cellula e cellula ("all cells come from cells"), completing the classical framework and disproving spontaneous generation. Louis Pasteur (1859): Conducted landmark experiments proving that microorganisms cannot spontaneously generate, firmly validating the third tenet of cell theory. @Aiyana! Let me know when you can play 😳😳😳 #isurvived #mid #fyp #basketball #fyppppppppppppppppppppppp

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