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151.

The heliophytes are characterised by:

A.	High OP, high K+ conc.	B.	High OP, low K+ conc.
C.	Low OP, low K+ conc	D.	Low OP, high K+ conc.

152.

When a plant of hot climate is transferred to colder regions, it gets an injury called:

A.	Chilling	B.	Thermal death
C.	Desiccation	D.	Freezing

153.

In western Himalayas, the Betula trees usually occur in:

A.	Tropical zone	B.	Sub-tropical zone
C.	Alpine zone	D.	Temperate zone

154.

The heliophytes possess:

A.	Low K+ concentration and low O.P.	B.	High K+ concentration and low O.P.
C.	Low K+ concentration and high O.P.	D.	High K+ concentration and high O.P

155.

Flowering is induced if germinating seeds are exposed to:

A.	Low temperature	B.	High Temperature
C.	Temperature below freezing	D.	Temperature above 45 degree C

156.

The composition of soil air is affected by:

A.	Pore size	B.	Soil organisms
C.	Type of roots	D.	All of these

157.

Albido value refers to:

A.	Turbidity of solar radiations	B.	Percentage of solar absorption
C.	Percentage of reflected light by a surface	D.	Amount of light absorbed by forests

158.

Plants growing near the sea whore are generally resistant to:

A.	Lodging	B.	Erosion
C.	Salt spray	D.	Injuries

159.

The albido value of a forest is around:

A.	1-2%	B.	3-5%
C.	5-10%	D.	20-30%

160.

Plants growing in rock crevices are called:

A.	Sciophytes	B.	Chasmophytes
C.	Helophytes	D.	None of these