Question

Question 11
Which of the following is NOT an essential micronutrient?

A
Boron

B
Calcium

C
Manganese

D
Nickel

Question 12
Deficiency of molybdenum causes

A
chlorosis of leaves

B
bending of leaf tip

C
poor development of vascular system

D
mottling and necrosis of leaves

Question 13
What are micronutrients?

A
They are as important in nutrition as the macronutrients.

B
They are more important in nutrition than macronutrients.

C
They may be omitted from culture media without any detrimental effect on the plant.

D
They are called ‘micro’ because they play only a minor role in plant nutrition.

Question 14
The leaves become yellow due to the deficiency of

A
iron and magnesium

B
potassium and calcium

C
nitrogen and copper

D
zinc and boron

Question 15
Rate of transpiration increases

A
in water

B
in the rainy season

C
in the absence of light

D
when the temperature is high

Question 16
Plant cooling occurs due to

A
guttation

B
assimilation

C
transpiration

D
photosynthesis

Question 17
Which of the following is a macronutrient?

A
Ca

B
Cu

C
Mn

D
Zn

Question 18
Premature leaf fall is due to the deficiency of

A
phosphorus

B
potassium

C
sodium

D
zinc

Question 19
Stomata usually open because they have

A
thin guard cells

B
bean-shaped structure

C
high concentration of CO2

D
low concentration of CO2

Question 20
Which of the following are not micronutrients?

A
P, Mg

B
Cu, B

C
Mo, Zn

D
Mn, Cu

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Answer 1

Answer:

11. calcium

12.mottling and necrosis of leaves

13.They are more important in nutrition than macronutrients.

14. nitrogen and copper

15.when the temperature is high

16.transpiration

17. Mn

18. phosphorus

19. high concentration of Co2

20.Cu,B

Answer 2

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1. Nickel

2. Chlorosis of leaves

3. They are called ‘micro’ because they play only a minor role in plant nutrition.

4. Nitrogen and Copper.

5. When the temperature is high.

6. Transpiration.

7. Ca.

8. Phosphorus.

9. Low concentration of CO2

10. P, Mg.