Question

Mass of living matter at a trophic level in an area at any time is called

• A. Standing crop
  
• B. Humus
• C. Detritus
• D. Standing state
  

Answer 1

The correct option is A Standing crop


Humus
Humus is a dark-colored amorphous substance formed by the decomposition process.

Standing crop
Standing crop refers to the quantity of biomass i.e the weight or the number of living organisms present at a particular time at a particular trophic level in the ecosystem.

Standing state
The standing state is the quantity of nutrients like calcium, nitrogen, carbon, and phosphorus present in the soil.

Detritus
Detritus is the dead organic matter of plants and animals including the fecal matter of animals.

Final answer
b. Standing crop