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141.

Which of the following is not a part of chlorophyll?

A.	Iron	B.	Nitrogen
C.	Carbon	D.	Hydrogen

142.

Wilting of leaves in hot weather is due to:

A.	Iron and calcium	B.	Sodium and copper
C.	Calcium and potassium	D.	Iron and magnesium Fe, Mg

143.

A micro-essential element is one which:

A.	Is less important than the major essential element	B.	Is more important than the major essential element
C.	Is present in small quantities in the soil	D.	Is needed in very small amounts but is as important as a major essential element

144.

Rotation of crops is practised in plants because:

A.	It decreases the nitrogen content of the soil	B.	It increases the nitrogen content of the soil
C.	It kills harmful bacteria of the soil	D.	It increases the water content of the soil

145.

It is advantageous to the Hydrilla to demonstrate photosynthesis than land plant because:

A.	It respires slowly	B.	It does not transpire
C.	It photosynthesizes rapidly	D.	Oxygen bubbles can be collected over water

146.

If you place a piece of tomato in concentrated solution:

A.	It would become limp due to loss of water from its cells	B.	It would become turgid due to absorption of water from salt solution
C.	It would die	D.	The plant is rapidly respiring

147.

When a piece of potato tuber is placed in concentrated salt solution:

A.	It would become turgid by absorbing water from salt solution	B.	It would become limp (shrink) due to loss of water from its solution
C.	It would die	D.	Nothing would happen

148.

According to the fluid mosaic model the correct sequence of plasmalemma is:

A.	L,-P,L,-P	B.	L,-P-P,-L
C.	P,-L,-L,P	D.	P,-P,-L,-L

149.

In the process of respiration in plants 180 gms. of sugar plus 192 gms. of oxygen produce:

A.	Large amount of CO2, no water and no energy	B.	132 gm, of CO2, 54 gms, of water and 337 kilo cals of energy
C.	264 gms. of CO2, 108 gms. of water and 674 kilo cals. of energy	D.	528 gms. of CO2,216 gms. of water and 1348 kilo cals. of energy

150.

Leaves with yellow or colourless patches are termed as:

A.	Lecorine	B.	Decolourized
C.	Etiolated	D.	Variegated