Decomposers like fungi and bacteria are :

i.	Autotrophs
ii.	Heterotrophs
iii.	Saptrotrophs
iv.	Chemo-autotrophs

Choose the correct answer :

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

The process of mineralization by micro-organisms helps in the release of:

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. $(\mathrm{kcal} {\mathrm{m}}^{-2}) {\mathrm{yr}}^{-1}$

An inverted pyramid of biomass can be found in which ecosystem?

Which of the following is not a producer?

Which of the following ecosystems is most productive in terms of net primary production? 

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

Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis? 

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

How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?