Ecosystem Test ...

The rate of biomass production and the rate of production of organic matter during photosynthesis are called ___________ respectively.

Secondary productivity is rate of formation of new organic matter by

Identify the wrong pair of statements
I.During plant succession some species colonise an area and populations becomes more numerous whereas populations of other species decline and even disappear
II.Both hydrarch and xerarch successions lead to mesic conditions 
III. Secondary succession is a slow process as compared to primary succession
IV.In successive seral stages there is no change in the diversity of species of organisms

In which of the following areas does the primary successions occur ?

The removal of keystone species will affect 

Pyramid of energy is always upright. This is in accordance with the law of 

A biogeochemical cycle without an atmospheric component is

Pick up the correct option
(a) Primary succession begins in areas where natural communities have been destroyed
(b) Hydrarch succession takes place in water
(c) Climax community is the community that is near equilibrium with immediate environment 
(d) In newly cooled lava secondary succession occurs

All successions whether taking place in water or on land proceed to a similar climax community which is