Q17 of 231 Page 93

Plant parts show two types of movements, one dependent on growth and the other independent of growth.
Give one example of the movement in plant parts:

(a) which depends on growth

(b) which does not depend on growth

(a) Phototropism is the growth of plant parts in the direction of its light source. The bending of stem or shoot towards light shows this process.

(b) Touch me not (also known is Chui-mui) is a touch sensitive plant. When we touch the leaves of this plant then they get folded.

To which directional stimuli do:

(a) roots respond?

(b) shoots respond?

Fill in the following blanks:

(a) A plant's response to light is called………………

(b) A plant's response to gravity is called………………

(d) Plant roots grow downward in response to………………

(e) Tendrils wind around a support in response to ………………

(j) Plant roots grow towards ………. and in the direction of force of………………

(g) A root of a plant grows downward. This is known as………………

(h) ……..is the hormone that causes phototropism in plants

(i) The response of leaves to the sunlight is called...............

What is a plant hormone? Name four plant hormones. State one function of each.

What does a root do in response to gravity? What is this phenomenon known as?

Plant parts show two types of movements, one dependent on growth and the other independent of growth.Give one example of the movement in plant parts:(a) which depends on growth(b) which does not depend on growth