Decomposers like fungi and bacteria are
(i) autotrophs
(ii) heterotrophs
(iii) saprotrophs
(iv) chemo-autotrophs
Choose the correct answer
(i) and (iii)
(i) and (iv)
(ii) and (iii)
(i) and (ii)
The process of mineralisation by microorganisms helps in the release of
inorganic nutrients from humus
both organic and inorganic nutrients from detritus
organic nutrients from humus
inorganic nutrients from detritus and formation of humus.
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) $\left(\mathrm{kcal} \mathrm{m}^{-2}\right) \mathrm{yr}^{-1}$
(ii)
(iii)
(ii) and (iv)
(i) and (iii)
An inverted pyramid of biomass can be found in which ecosystem?
Forest
Marine
Grass land
Tundra
Which of the following is not a producer?
Spirogyra
Agaricus
Volvox
Nostoc