Give the scientific terms used to represent the following:
(a) Bending of a shoot towards the light.
(b) Growing roots towards the earth.
(c) The growth of a pollen tube towards ovule.
(d) Bending roots towards the water.
(e) The winding of tendril around a support.
(a) Bending of shoot towards light - phototropism
(Photo = light,tropism = movement)
(b) Growing of roots towards earth - geotropism.
(This means that plant respond positively for gravitational force.)
(c) Growing of pollen tube towards ovule - chemotropism
(chemo = chemicals)
(d) :- Bending of roots towards the water - hydrotropism
(e) The winding of tendril around a support - thigmotropism.
(Tendrils are thin thread-like growths on the leaves or stems of the climbing plant. They grow towards support and wind around them.)