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11.

Desert can be converted into green land by:

A.	Oxylophytes	B.	Psammophytes
C.	Halophytes	D.	Tropical trees

12.

When a soil has been thoroughly wetted and then allowed to drain until capillary movement of the water has stopped, the water content of the soil will give an estimate of it's:

A.	Gravitational water	B.	Capillary water
C.	Field capacity	D.	Storage capacity

13.

The plants growing on saline soils are called:

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

14.

Water holding capacity is highest in

A.	Clayey soil	B.	Loamy soil
C.	Silty soil	D.	Sandy soil

15.

Plants growing in loose non-saline soil are:

A.	Xerophytes	B.	Halophytes
C.	Mesophytes	D.	Lithophytes

16.

Water available to plant is:

A.	Run off water	B.	Gravitational water
C.	Hygroscopic water	D.	Capillary water

17.

Among the following characters which one does not characterise a hydrophyte?

A.	Abundant air spaces and air chambers	B.	Plentiful xylem and sclerenchyma
C.	Leaves having stomata only on the upper side or none	D.	Poor development of roots

18.

Plants that grow in a marshy saline habitat are called:

A.	Hydrophytes	B.	Xerophytes
C.	Mesophytes	D.	Mangroves

19.

Water logging occurs:

A.	In sandy soil	B.	On gravels
C.	In loamy soil	D.	In clay soil

20.

In submerged hydrophytas, functional stomata are found:

A.	On upper surface of the leaf	B.	Lower surface of the leaf
C.	Both the surfaces of the leaf	D.	Nowhere on the plant