#### Living World of Plants : Plant Physiology - Important Question Paper

9th Standard

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Science

Time : 01:00:00 Hrs
Total Marks : 50

Part A

5 x 1 = 5
1. The tropic movement that helps the climbing vines to find a suitable support is ________.

(a)

phototropism

(b)

geotropism

(c)

thigmotropism

(d)

chemotropism

2. The chemical reaction occurs during photosynthesis is ________.

(a)

CO2 is reduced and water is oxidized

(b)

water is reduced and CO2 is oxidized

(c)

both CO2 and water are oxidized

(d)

both CO2 and water are produced

3. Transpiration is best defined as _________

(a)

loss of water by the plant

(b)

evaporation of water from the aerial surfaces from the plant

(c)

loss of water in the form of water vapour from the underground parts of the plant body

(d)

release of water from the plant into the atmosphere

4. The non-directional movement of a plant part in response to temperature is called ________.

(a)

thermotropism

(b)

Thermonasty

(c)

chemotropism

(d)

thigmonasty

5. Chlorophyll in a leaf is required for __________.

(a)

photosynthesis

(b)

transpiration

(c)

tropic movement

(d)

nastic movement

6. Part B

5 x 1 = 5
7. __________ is positively hydrotropic as well as positively geotropic.

()

Root

8. Hydrotropism : Response towards water Phototropism : ___________

()

9. Photosynthesis : ____________ Transpiration : Stomata

()

10. When the leaves of a sensitive plant are touched with a finger, they fold up and when light fades at dusk the petals of a Dandelion flower close. These two plants show ____ and_____ movements.

()

Thigmonasty ; Photonasty

11. The raw materials for photosynthesis are _________ and _______.

()

CO2, H20 and Chlorophyll & Light

12. Part C

3 x 1 = 3
13. When the leaves of Mimosa pudica plant are touched with the finger, they fold up quickly.This is an example of thigmonasty.

(a) True
(b) False
14. The petals of moon flower open up in morning and closes in the evening. This is called photonasty.

(a) True
(b) False
15. Plants lose water when the stomata on leaves are closed.

(a) True
(b) False
16. Part D

16 x 2 = 32
17. Give an example for a plant whose leaf shows a mesmerizing movement.

18. Write the scientific terms used to represent the following:
a) Growing of roots towards the gravity.
b) Bending of roots towards the water.

19. Observe the given picture.
a) Identify this plant. What type of special movement is shown by this plant?
b) What are the other movements seen in this plant?

20. What is the end product of photosynthesis?

21. Name the minute openings seen on the lower surface of the leaf.

22. Give the technical terms for the following:
a) Growth dependent movement in plants.
b) Growth independent movement in plants.

23. Study the pictures below and then complete the table by putting a plus (+) if the shoot or root grows towards the stimulus and a minus (-) if it grows away from it.

Stimulus Light Gravity
Shoot + -
Root ? +

24. Name the movement seen in Pneumatophores of Avicennia

25. What is the other name for thigmonasty?

26. Which flowering plant shows photonasty just opposite to that of Dandelion?

27. Give an example for negative hydrotropism.

28. Fill in the blanks:
6CO2+________$\overset { Sunlight }{ \underset { Chlorophyll }{ \longrightarrow } }$ _____ +6H2O+6O2 $\uparrow$

29. Which gas is evolved during photosynthesis?

30. What is chlorophyll?

31. Give an example for micronutrients.

32. Complete the following table with the different types of tropism:

Stimulus Gravity Unilateral light Water
Tropism Geotropism ? Hydrotropism
Response Shoot    ? Positive No response
Root Positive   ? ?
33. Part E

1 x 5 = 5
34. Design an experiment to demonstrate hydrotropism.