The phosphorus cycle differs from those of carbon and nitrogen as well as those of sulphur,oxygen and hydrogen in that it lacks

The species of plants that play a vital role in controlling the relative abundance of other species in a community are called

Which of the following are primary consumers in a food chain?

Out of the total cost of various ecosystem services, the soil formation accounts for $P$, while contributions of other services like recreation and nutrient cycling are less than $Q$ each. The value of climate regulation and habitat for wildlife is about $R$ each. Identify $P, Q,$ and $R$.

In a pond ecosystem,benthos means

Out of the following biogeochemical cycles, which ones are gaseous?
$I.$ Sulphur
$II.$ Phosphorus
$III.$ Nitrogen
$IV.$ Carbon
Choose the correct option.