Q. 25.0( 2 Votes )
a. Stimulus A is water as roots bend towards it but shoot bends away from it. Roots are positively hydrotropic whereas shoot is negatively hydrotropic.
b. Stimulus B is gravity of earth. Roots bend towards earth gravity so it is positively geotropic whereas shoot bends away from it so it is negatively geotropic.
c. Stimulus C is light as shoot bends towards light showing positively phototropism but roots bend away from light showing negatively phototropism.
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