What is true about the phosphorus cycle?
$I.$ Rocks are the natural reservoirs of phosphorus
$II.$ Weathering of sedimentary rocks makes phosphate available to the soil
$III.$ Herbivores and carnivores obtain phosphorus from plant directly or indirectly Choose the correct option
Which one of the following will accelerate phosphorus cycle?
Poaching of tiger is a burning issue in today's world. What implication would this activity have on the functioning of the ecosystem of which the tigers are an integral part ?
Alpine forests of Himalayas have
Which of the following is an example of man-made ecosystem?