Which ones are the reservoirs of sulphur and carbon cycles respectively?

Plains with snow, ice, and frozen soil for most of the year are found in

A scorpion stalks, kills, and then eats a spider. Based on its behavior, which ecological terms describe the scorpion?

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

Which one of the following ecosystem types has the highest annual net primary productivity ?