Productivity is the rate of production of biomass expressed in terms of :
i. $(\mathrm{kcal} {\mathrm{m}}^{-3}) {\mathrm{yr}}^{-1}$
ii. $\mathrm{g} {\mathrm{m}}^{-2} {\mathrm{yr}}^{-1}$
iii. $\mathrm{g} {\mathrm{m}}^{-1} {\mathrm{yr}}^{-1}$
iv. $(\mathrm{kcal} {\mathrm{m}}^{-2}) {\mathrm{yr}}^{-1}$

 

1.	ii	2.	iii
3.	ii and iv	4.	i and iii

Pyramid of numbers is :
1. Always upright
2. Always inverted
3. Either upright or inverted
4. Neither upright nor inverted

Among the following, where do you think the process of decomposition would be the fastest?

During the process of ecological succession, the changes that take place in communities are :
1. Orderly and sequential
2. Random
3. Very quick
4. Not influenced by the physical environment

Climax community is in a state of :
1. Non-equilibrium
2. Equilibrium
3. Disorder
4. Constant change

If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be 

Net primary productivity is the gross primary productivity minus: