Question

EXPLAIN THE TYPES OF TROPISM ?

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Answer 1

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), thigmotropism (response to mechanical stimulation), traumatotropism (response to wound lesion), and galvanotropism, or electrotropism (response to electric current). Most tropic movements are orthotropic; i.e., they are directed toward the source of the stimulus. Plagiotropic movements are oblique to the direction of stimulus. Diatropic movements are at right angles to the direction of stimulus

Answer 2

✨hey here is ur answer ✨

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Tropic movements take place with respect to the direction of the stimulus

These movements may be in the direction of stimulus or opposite to it

There are five types of tropic movements on the basis of five common stimuli.....

1) Movement in response to light- phototropism

2) Movement in response to gravity- geotropism

3) Movement in response to water- hydrotropism

4) Movement in response to chemicals chemotropism

5) Movements in response to touch- thigmotropism...

Phototropism⤵

It is the growth movement of plant parts in response to light as stimulus .
phototropism is directional growth movement of curvature in response to unilateral exposure to the light...

Geotropism ⤵

It is the growth movement of plant part in response to gravity.
if the plant part moves in the downward it is called positively geotropic ,
but , if it moves in upward direction against the gravity , it is negatively geotropic...

Hydrotropism ⤵

It is the growth movement of the plant parts in response to water as stimulus .
it's a plant moves towards water then it is called positively hydrotropic but if it moves away from water then it is called negatively hydrotropic....

Chemotropism⤵

It is the growth movement of plant part in response to a chemical .
if a plant part moves towards a chemical, it is said to be positively chemotropic. but if it moves away from a chemical ,
it is said to be negatively chemotrophic..

Thimotropism ⤵

It is the growth movement of plant part in response to stimulus to touch or contact. for eg , tge climbing organs of plant such as tendrils and twinners coil around a support in order to move ahead and climb up they are said to be positively thigmotropic....

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