Forestry

Food

Pharmaceuticals

Both (a) & (b)

None of these

Australia

United State

China

Iran

3,350 m to 3,800 m

4,450 m to 4,800 m

5,550 m to 5,800 m

None of these

Chemical cycle

Biogeochemical cycle

Geological cycle

Geochemical cycle

Radiation hazard

Desertification

Deforestation

Gleization

Harmful relationship of two organisms

A process advantageous to algae

Living together

Phenomenon useful to fungi

When mature crop is removed by clear felling and regeneration is entirely by vegetative methods

When some selected shoots are selected for retention for future period

When crop is partly of coppicing and partly of seedling organ of different age clear

None of these

Trees are raised with the preliminary object of helping a less hardy species

They are usually removed at an early stage as soon as they have served this purpose

Both (a) & (b)

None of these

Closely related species growing in the same habitat

Closely related species growing in the same niche

Distantly related species growing in different niche

Distantly related species growing in different habitat

Mutualism

Symbiosis

Co-operation

Commensalism