The amount of photosynthetically active radiation captured by plants is

The amount of nutrients,such as carbon,nitrogen,phosphorus,calcium,etc.,present in the soil at any given time is referred to as $..........$.

Micro-consumers in an ecosystem can be classified into which of the following categories?

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 $R$.

The detritus food chain begins with which of the following?

Which of the following organisms are placed in the third trophic level in an ecosystem?