Q10 of 86 Page 152

Cover the tip of the shoot with tin foil cap and light it from the side as shown in the given picture. What would you expect to happen? Why?

As tips of shoot are covered with tin foil cap the shoot does not show any bending towards light. Because light cannot penetrate through tin foil cap to reach shoot tip to break down auxin. Auxin are responsible for bending of shoot tip towards light.


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8

A potted plant is kept horizontally for a considerable time. The three positions of the part A and B of the potted plant are shown in the following figures.

(i) Potted plant with shoot and root growing downward. (Diagram to be drawn)



(ii)


(iii) Potted plant with shoot and root growing upward (Diagram to be drawn)



a) Which figure shows the correct position taken by the parts A and B of the plant?


b) What type of phenomenon is exhibited by the figure by (A) in the figure (ii)?

 9

Complete the following table with the different types of tropism:

 11

In the given photosynthetic experiment, what will happen to the leaf closed with black paper in starch test? Why?

 12

Label the diagram with the raw materials and products of photosynthesis.