Select the correct difference between standing crop and standing state.

	Standing crop	Standing state
(a)	It is the amount of inorganic	It is the amount of biomass
(b)	It is represents part of non - living matter	It represents entire living matter
(c)	It cannot be circulated between living and non-living components	It can be circulated
(d)	It is regularly depleted and replenished	It is continuously synthesised

Standing crop - It represents the quantity of biomass in an ecosystem. The whole living matter is represented by it and it is not circulated. There are continuous consumption and synthesis of biomass.

Standing state - The total quantity of inorganic nutrients in an ecosystem is represented as a standing state. The whole of the non-living matter is represented by it and there is circulation between the biotic and abiotic components of the ecosystem.