Tropism (Types, positive & negative) | Control & Coordination | Biology | Khan Academy

[@jennicadsouza3451]

Phototropism means movement towards light .
Geotropism means movement of plant growing towards the earth gravity .
Hydrotropism mea s movement of plants parts in response to water or moisture.
Thigmotropisn means the growth of movement of plant parts in response to the lower stimulus is called thigmotropism.
Chemotropism is the phenomena of growth of plant organs in response to chemicals
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[@nibeditapattanaik3751]

towards or away. not just towards. movement towards the stimulus is called positive tropism whereas movement away from the stimulus is called negative tropism

[@aryanshsingh9282]

Thigmotropism means movement of pant in response to touch

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[@Ratherbedie6109]

This video really help's to understand what's happening between away and towards the tropism . And your voice is clear to understand easily. Thank you very much ❤️

[@jennicadsouza3451]

Tropism : response or orientation of a plant to certain stimulus that acts with greater intensity from one direction to another is called tropism

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[@b-zar8912]

Tropic movements and nastic movements. I learnt this briefly in 6th std ICSE and it was never mentioned again (I'm going to be in 11th now. XD) It feels nice finally knowing what they mean now.

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[@FrankaAppiah]

My tutor said tropisms refers to movements of plants to external unilateral stimulus

[@chinmaysgames9453]

In example of Venus flytrap, I think it should be tropic movement as the plant feels the presence of insect and then trap it, so it would be thigmotropism

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Your teaching well but what is the cause of the phototropism

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[@FrankaAppiah]

Then touch should be a tropical movement like the mimosa

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does root cell able to respond light?

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