Question

Give the scientific terms used to represent the following : A) Bending of shoot towards light B) Growing pf roots towards earth C) Growing of pollen tube towards ovule D) Bending of roots towards water E) Winding of tendril around a support.

Page 262 Chapter - 14.Control and Co-Ordination in Organisms

Answer 1

A. Phototropism
B. Geotropism
C. Chemotropism
D. Hydrotropism
E. Thigmotropism

Answer 2

Bending of shoot towards light - phototropism
(Photo = light,tropism = movement)

Growing of roots towards earth - geotropism.
(This means that plant respond positively for gravitational force.)

Growing of pollen tube towards ovule - chemotropism

Bending of roots towards water - hydrotropism
(hydro=water)

Winding of tendril around a support - thigmotropism.
(Tendrils are thin thread like growths on the leaves or stems of climbing plant.They grow towards support and wind around them.)

Hope it helps