Difference between phototropism and heliotropism.Which
of these does sunflower possess?

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Solution

HELIOTROPISM PHOTOTROPISM

It is the directional motion of plants parts in response to sunlight.
For example, Sunflower face is the direction of sun due to their ability of 'heliotropism'. It is the growth movement of plants in response to light stimulus
For example, growth of the sunflower plant towards light is phototropism

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How does phototropism occur in plants?

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HELIOTROPISM	PHOTOTROPISM
It is the directional motion of plants parts in response to sunlight. For example, Sunflower face is the direction of sun due to their ability of 'heliotropism'.	It is the growth movement of plants in response to light stimulus For example, growth of the sunflower plant towards light is phototropism