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  2. Biological system - Wikipedia

    en.wikipedia.org/wiki/Biological_system

    A biological system is a complex network which connects several biologically relevant entities. Biological organization spans several scales and are determined based different structures depending on what the system is. [1]

  3. Biological organisation - Wikipedia

    en.wikipedia.org/wiki/Biological_organisation

    A population of bees shimmers in response to a predator. Biological organisation is the organisation of complex biological structures and systems that define life using a reductionistic approach. [1]

  4. Geologic record - Wikipedia

    en.wikipedia.org/wiki/Geologic_record

    The layer cake like appearance of concordant strata laid down over hundreds of thousands of years (in northern Spain) Strata turned sideways by orogenic forces near San Sebastián, Spain The geologic record in stratigraphy , paleontology and other natural sciences refers to the entirety of the layers of rock strata .

  5. Physical layer - Wikipedia

    en.wikipedia.org/wiki/Physical_layer

    In the seven-layer OSI model of computer networking, the physical layer or layer 1 is the first and lowest layer: the layer most closely associated with the physical connection between devices. The physical layer provides an electrical, mechanical, and procedural interface to the transmission medium.

  6. Biological network - Wikipedia

    en.wikipedia.org/wiki/Biological_network

    In biology, pairwise interactions have historically been the focus of intense study. With the recent advances in network science , it has become possible to scale up pairwise interactions to include individuals of many species involved in many sets of interactions to understand the structure and function of larger ecological networks . [ 29 ]

  7. Biogeochemistry - Wikipedia

    en.wikipedia.org/wiki/Biogeochemistry

    Biogeochemistry research groups exist in many universities around the world. Since this is a highly interdisciplinary field, these are situated within a wide range of host disciplines including: atmospheric sciences, biology, ecology, geomicrobiology, environmental chemistry, geology, oceanography and soil science.

  8. Double layer (biology) - Wikipedia

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

    In certain organisms, cells are covered with the glycocalyx layer, which can be modeled as a polyelectrolyte layer with a volume spread electric charge. [clarification needed] This means that the notion of a surface charge is located on certain flat surfaces. This does not apply; instead, the cell surface is a finite thickness polyelectrolyte ...

  9. History of cell membrane theory - Wikipedia

    en.wikipedia.org/wiki/History_of_cell_membrane...

    In this view, the cell was seen to be enclosed by a thin surface, the plasma membrane, and cell water and solutes such as a potassium ion existed in a physical state like that of a dilute solution. In 1889, Hamburger used hemolysis of erythrocytes to determine the permeability of various solutes. By measuring the time required for the cells to ...

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