Biology 11 Chapter - 10 Form and Function in Plants -7

Biology 11 Chapter - 10
Form and Function in Plants -7

1. Which one of the following forces is involved to transport water from roots to the leaves?

a) All of these
b) Transpiration
c) Adhesion
d) Cohesion

2. The loss of water vapours by evaporation from aerial parts of the plant body is known as?

a) Transpiration
b) Cohesion
c) Translocation
d) Diffusion

3. The attractive force between water molecules and other substances is known as?

a) Adhesion
b) Cohesion
c) Transpiration
d) Tension

4. The hollow spaces in the xylem attract water due to polarity of?

a) Both of these
b) Water
c) Cellulose
d) None of these

5. The network of individually weak hydrogen bonds within water molecule collectively produce a force known as?

a) Cohesion
b) Adhesion
c) Transpiration
d) Tension

6. The upward movement of water within the narrow tubes like xylem is known as?

a) Capillary action
b) Osmosis
c) Diffusion
d) Transpiration

7. The u shaped surface formed by water during capillary action is known as?

a) Meniscus
b) Xylem
c) Osmosis
d) Plasmolysis

8. The force that pulls water from regions where the water potential is greater to those with lower water potential is known as?

a) Tension
b) Cohesion
c) Adhesion
d) Transpiration

9. The starch sugar hypothesis and the influx of k ions hypothesis explain?

a) A. B and c are correct
b) B. Opening of stomata
c) C. Closing of stomata
d) D. Effects of transpiration

10. Starch sugar hypothesis was proposed by?a) Mohl
b) Mendel
c) Pastuer
d) Neil

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