The reservoir is located in the Earth’s crust for:
I. Gaseous type of nutrient cycle
II. Sedimentary nutrient cycle
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II

The function of a reservoir of nutrient cycle is to:
1. synthesize minerals
2. transfer minerals to other ecosystems
3. meet any deficit
4. destroy the unwanted minerals

The maximum percent of total global carbon is found:
1. in fossil fuels
2. in atmosphere
3. dissolved in oceans
4. in biomass of microbes

Regarding phosphorus cycle:

1. Only I is true.
2. Only II is true.
3. Both I and II are true.
4. Both I and II are false.

Identify the incorrectly matched pair:

Identify the incorrectly matched pair:
1. Carnivores -- secondary or tertiary consumer
2. Decomposers -- microbial heterotrophs
3. Herbivores -- primary consumer
4. Omnivores -- molds, yeasts and mushrooms

Productivity is the rate of production of biomass expressed in terms of :
i. $(\mathrm{kcal}<mspace\; width="1em"></mspace>{\mathrm{m}}^{-3})<mspace\; width="1em"></mspace>{\mathrm{yr}}^{-1}$
ii. $\mathrm{g}<mspace\; width="1em"></mspace>{\mathrm{m}}^{-2}<mspace\; width="1em"></mspace>{\mathrm{yr}}^{-1}$
iii. $\mathrm{g}<mspace\; width="1em"></mspace>{\mathrm{m}}^{-1}<mspace\; width="1em"></mspace>{\mathrm{yr}}^{-1}$
iv. $(\mathrm{kcal}<mspace\; width="1em"></mspace>{\mathrm{m}}^{-2})<mspace\; width="1em"></mspace>{\mathrm{yr}}^{-1}$

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

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