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211.

Reduction of mechanical and vascular tissue and poor roots are found in:

A.	Hydrophytes	B.	Xerophytes
C.	Halophytes	D.	None of these

212.

Plants die from prolonged water logging because:

A.	Soil nutrients become very dilute	B.	Root respiration stops
C.	Nutrients leach down due to excessive water	D.	Cell sap in plant becomes too dilute

213.

Sxerophytes are generally found in:

A.	Desetts	B.	Water
C.	Hills	D.	Water bank

214.

Relative to shoots, the roots can be very massive in plants of:

A.	Deserts	B.	Lakes and ponds
C.	Mixed temperate forests	D.	Mixed tropical forests

215.

Endemic plants are those which grow in:

A.	Fresh water lakes	B.	Shady places
C.	Tissue of other plants	D.	Geographically limited areas

216.

At which latitude, heat grain through insolation approximately equals heat loss through terrestrial radiation?

A.	42 1/2? North and South	B.	22 1/2? North and South
C.	60? North and South	D.	40? North and South

217.

Plants of salty seashore wetlands are called:

A.	Halophytes	B.	Heliophytes
C.	Hydrophytes	D.	Saprophytes

218.

Unutilized place for the growth of flora (vegetation) is:

A.	Dark cave	B.	Pond
C.	River bank	D.	Saline water

219.

The average amount of CO2 in atmosphere is:

A.	0.30%	B.	0.00%
C.	3.00%	D.	0.03%

220.

Stratification is most complex in:

A.	Tropical forest	B.	Deciduous forests
C.	Savannah	D.	Both (a) and (b)