Climax vegetation of a region is generally

Biosphere reserve programme started in India

Deciduous forests are mainly found in region where annual precipitation ranges between

Noosphere relates to an environment dominated by

Energy for the detritus food chain comes from

Consider the following statements about carbon cycle and choose how many statements are correct?

$(a)$ Atmosphere has $71\;\%$ of total global carbon
$(b)$ Decomposers contribute substantially to $CO_2$ pool by their processing of waste materials and dead organic matter of land or oceans
$(c)$ $4 × 10^{13}\; kg$ carbon is fixed through photo-synthesis annually
$(d)$ No respiratory input into atmosphere
$(e)$ Carbon constitutes $ 49\;\%$ of dry wt. of organisms