According to Odum the light absorbed by the plant cover in terms of kcal/m2/day is:

A. 150
B. 1,500
C. 300
D. 3,000

The pyramid that cannot be inverted in a stable ecosystem is the pyramid of:

A. Energy
B. Number
C. Biomass
D. All of these

The gross production minus losses in an ecosystem is indicated as:

A. Net production
B. Secondary production
C. Net storage
D. Net primary production

In a parasitic food chain which trophic level is represented by bugs and lices?

A. T4
B. T3
C. T2
D. T1

The importance of ecosystem lies in:

A. Cycling of materials
B. Flow of energy
C. Both (a) & (b)
D. None of the above

From the onwards the coppice crop will be thinned on a ______ cycle:

A. 5 years
B. 7 years
C. 10 years
D. None of these

The pyramid of biomass in a shallow pond ecosystem is:

A. Inverted
B. Upright
C. Rhomboidal
D. Liver

Which ecosystem has the highest primary productivity?

A. Pond ecosystem
B. Lake ecosystem
C. Grassland ecosystem
D. Forest ecosystem

The irrigated plantations of the ______ are regenerated to a great extent by coppice:

A. Punjab
B. Sindh
C. Baluchistan
D. KPK

The biotic and abiotic components of the ecosystem are connected through:

A. Standing quality
B. Climatic regime
C. Transducers
D. Humification and mineralization