Halophytes growing on mud are called:

A. Pelophilous
B. Heliophilous
C. Psammophilous
D. Lithophilous

Soil salinity is measured by:

A. Potometer
B. Porometer
C. Colorimeter
D. Conductivity meter

Commensalism is:

A. When both partners are harmed
B. When both partners are benefited
C. When weaker partner is benefited and the stronger is unharmed
D. None of these

Magnolia and oaks occur in the following zone:

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

Good soil is:

A. Which allows limited amount of water to be retained into it
B. Which allows water to pass through it very quickly
C. Which allows percolation the water slowly from it
D. Which holds whole of the water that enters into it

When a plant first begins to wilts permanently in a pot, its 54.5 gms of soil has 4.5 gms of water. The PWP of this soil is:

A. 4.50%
B. 9%
C. 8.25%
D. 16.50%

The rock cover of the earth is called:

A. Lithosphere
B. Xerosphere
C. Pasmmosphere
D. Pedosphere

The plants which can withstand narrow range of temperature tolerance:

A. Stenothermic
B. Eurythermic
C. Monothermic
D. Mesothermic

Largest amount of fresh water on our planet is contained:

A. In lakes and streams
B. In rivers
C. Underground
D. On polar ice and glaciers

Plants growing near sea shore will usually have xerophytic characters, like thick leaves, because:

A. There is plenty of water in the soil
B. There is too high a concentration of salts for the plants to absorb sufficient water from the soil
C. Light available to plant is not sufficient
D. The soil is muddy