Question

Answer the question below

Answer 1

Phototropic tip of stem ex:sunflower
Gravity tip of root ex: all green plants
Hydro root ex:cacti
Chemo pollen tube ex: pollen grain
Electro chemical dendrites ex:nerve cell

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Answer 2

Shoots are positively phototropic while roots are negative phototropic

Reason-the auxin gets accumulated on the darker side of the shoot resulting in rapid cell division on the side causing bending of shoot

Ex-any healthy potted plant, sunflower

Shoots are negatively geotropic while

roots are positively geotropic

Ex-Any healthy potted plant

Roots are positively hydotropic while roots are negatively hydrotropic ex-bean seed

Gymnosperms and angiosperms show chemotropism

Ex- as in hibiscus flower