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  2. Extracellular digestion - Wikipedia

    en.wikipedia.org/wiki/Extracellular_digestion

    Extracellular phototropic digestion is a process in which saprobionts feed by secreting enzymes through the cell membrane onto the food. The enzymes catalyze the digestion of the food, i.e., diffusion, transport, osmotrophy or phagocytosis. Since digestion occurs outside the cell, it is said to be extracellular.

  3. Ecological efficiency - Wikipedia

    en.wikipedia.org/wiki/Ecological_efficiency

    Ecological efficiency is a combination of several related efficiencies that describe resource utilization and the extent to which resources are converted into biomass. [ 1 ] Exploitation efficiency is the amount of food ingested divided by the amount of prey production ( I n / P n − 1 {\displaystyle I_{n}/P_{n-1}} )

  4. Competitive exclusion principle - Wikipedia

    en.wikipedia.org/wiki/Competitive_exclusion...

    Paramecium aurelia and Paramecium caudatum grow well individually, but when they compete for the same resources, P. aurelia outcompetes P. caudatum.. Based on field observations, Joseph Grinnell formulated the principle of competitive exclusion in 1904: "Two species of approximately the same food habits are not likely to remain long evenly balanced in numbers in the same region.

  5. Competition (biology) - Wikipedia

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

    Competition is an interaction between organisms or species in which both require one or more resources that are in limited supply (such as food, water, or territory). [1] Competition lowers the fitness of both organisms involved since the presence of one of the organisms always reduces the amount of the resource available to the other.

  6. Nutrition - Wikipedia

    en.wikipedia.org/wiki/Nutrition

    In nutrition, the diet of an organism is the sum of the foods it eats. [9] A healthy diet improves the physical and mental health of an organism. This requires ingestion and absorption of vitamins, minerals, essential amino acids from protein and essential fatty acids from fat-containing food.

  7. Food - Wikipedia

    en.wikipedia.org/wiki/Food

    Food is any substance consumed by an organism for nutritional support. Food is usually of plant, animal, or fungal origin and contains essential nutrients such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism and assimilated by the organism's cells to provide energy, maintain life, or stimulate ...

  8. Dying To Be Free - The Huffington Post

    projects.huffingtonpost.com/dying-to-be-free...

    “The history of 12-step came out of white, middle-class, Protestant people who want to be respectable,” said historian Nancy Campbell, a professor at Rensselaer Polytechnic Institute. “It offers a form of community and a form of belonging that is predicated upon you wanting to be normal, you wanting to be respectable, you wanting to have ...

  9. Resource (biology) - Wikipedia

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

    In biology and ecology, a resource is a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. [1] [2] [3] For plants key resources are light, nutrients, water, and space to

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