Tropism - Wikipedia
网页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 and Examples | Biology Dictionary
网页2017年4月28日 · 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.
Tropism | Phototropism, Geotropism & Chemotropism | Britannica
网页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.
Tropism (Types, positive & negative) | Control & Coordination - YouTube
网页Let's explore (+ & -) photo, geo, chemo, thigmo, & hydrotropism. More free lessons & practice -https://www.khanacademy.org/science/class-10-biology/in-in-co...
Plant Tropisms - Phototropism, Thigmotropism, and More
网页2018年2月28日 · Plant tropisms are mechanisms by which plants adapt to environmental changes. A tropism is a growth toward or away from a stimulus. Common stimuli that influence plant growth include light, gravity, water, and touch.
Tropism Definition & Meaning - Merriam-Webster
网页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.
4.2.1: Tropisms - Biology LibreTexts
网页A tropism is directional growth in response to a stimulus. A positive tropism occurs when a plant (or a part of the plant) grows towards the stimulus, and a negative tropism is growth away from the stimulus.
Tropism | Encyclopedia.com
网页2018年5月9日 · tropism (tropic movement) A directional response by a plant to a stimulus. It may be positive or negative (i.e. towards or away from the source of the stimulus).
16.2F: Tropisms - Biology LibreTexts
网页2022年5月15日 · A tropism is a growth movement whose direction is determined by the direction from which the stimulus strikes the plant. There are two forms: Positive = the plant, or a part of it, grows in the direction from which the stimulus originates. and Negative = growth away from the stimulus.
7.13: Tropisms - K12 LibreTexts
网页2021年1月11日 · Plants may not be able to move to another location, but they are able to change how they grow in response to their environment. Growth toward or away from a stimulus is known as a tropism (Table below). Auxins, a class of plant hormones, allow plants to curve in specific directions as they grow.
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