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tropism    
n. 向性,趋性,屈性

向性,趋性,屈性

tropism
n 1: an involuntary orienting response; positive or negative
reaction to a stimulus source

Tropism \Tro"pism\ (tr[=o]"p[i^]z'm), n. [Gr. troph` a turning,
tre`pein to turn -ism.] (Physiol.)
Modification of the direction of growth, caused by some
external influence, such as light; -- sometimes used for
motion of an organism toward or away from an external
stimulus, more properly called {taxis}.
[Webster 1913 Suppl. PJC]


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  • Tropism - Wikipedia
    In biology, a tropism is a phenomenon indicating the growth or turning movement of an organism, usually a plant, in response to an environmental stimulus [1] In tropisms, this response is dependent on the direction of the stimulus (as opposed to nastic movements, which are non-directional responses)
  • Tropism – Definition, Types, Mechanism, Examples, Importance
    Definition of Tropism Tropism is the innate response of an organism, particularly plants, to orient or move towards or away from an external stimulus, such as light or gravity
  • TROPISM Definition Meaning - Merriam-Webster
    The meaning of TROPISM is involuntary orientation by an organism or one of its parts that involves turning or curving by movement or by differential growth and is a positive or negative response to a source of stimulation How to use tropism in a sentence Did you know?
  • Tropism | Phototropism, Geotropism Chemotropism | Britannica
    tropism, response or orientation of a plant or certain lower animals to a stimulus that acts with greater intensity from one direction than another It may be achieved by active movement or by structural alteration Forms of tropism include phototropism (response to light), geotropism (response to gravity), chemotropism (response to particular substances), hydrotropism (response to water
  • 4. 2. 1: Tropisms - Biology LibreTexts
    A tropism is a growth movement whose direction is determined by the direction from which the stimulus strikes the plant There are two forms: nbsp; Positive = the plant, or a part of it, grows in the …
  • Tropism - Definition, Types and Examples | Biology Dictionary
    Tropism Definition A tropism is the innate ability of an organism to turn or move in response to a stimulus As opposed to a learned ability, innate reactions are genetically programmed Organisms with a tropism will naturally turn toward a stimulus A stimulus can be any signal from the environment, and individual tropisms are often named after the stimulus that causes the movement In a
  • Plant Tropisms: Phototropism, Thigmotropism, and More
    Tropism in plants is a growth toward or away from a stimulus Common stimuli that influence plant growth include light, gravity, water, and touch Tropisms in plants differ from other stimulus generated movements, such as nastic movements, in that the direction of the response depends on the direction of the stimulus
  • What Is Tropism in Biology and Its Major Forms?
    The Biology Behind Tropism The directional growth observed in tropisms is largely controlled by plant hormones, particularly auxins Auxins are a class of plant hormones that regulate various growth processes, including cell elongation and cell division
  • Tropism Definition Types and Examples in Plants - Vedantu
    Tropism is the directional growth response of a plant toward or away from an external stimulus It allows plants to grow in response to environmental factors such as light, gravity, water, and touch In tropism: The response is directional and depends on the direction of the stimulus It involves differential growth on one side of the plant organ It is commonly observed in stems, roots, and
  • Tropism: How Instincts Drive Your Hidden Behaviors
    The Core Definition of Tropism Tropism, a term derived from the ancient Greek word “τροπή” (tropē), meaning “to turn” or “to react to,” represents a fundamental biological phenomenon where an organism responds to an external stimulus by orienting its growth or movement in a particular direction This involuntary directional response is a critical adaptive mechanism observed





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