The process of mineralisation by microorganisms helps in the release of

Productivity is the rate of production of biomass expressed in terms of

(i) $\left(\mathrm{kcal} \mathrm{m}^{-3}\right) \mathrm{yr}^{-1}$

(ii) $\mathrm{g}^{-2} \mathrm{yr}^{-1}$

(iii) $\mathrm{g}^{-1} \mathrm{yr}^{-1}$

(iv) $\left(\mathrm{kcal} \mathrm{m}^{-2}\right) \mathrm{yr}^{-1}$

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?