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Question
The amount of living material present at different trophic levels at a given time is called ___________ .
The amount of living material present at different trophic levels at a given time is called ___________ .
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Solution
The correct option is D standing crop
A food chain refers to the sequence of organisms where one living organism eats another. It also shows the flow of nutrients and energy from one organism to another at different trophic levels in a food chain.
Different organisms occupy different levels in the food chain and each level is referred to as trophic levels.
Each trophic level has a certain mass of living material at a particular time called the standing crop. The standing crop is measured as the mass of living organisms (biomass) or the number in a unit area. For example, crops in the field, fishes in a pond, etc. Hence option d is correct.
Biomass refers to the mass or weight of living tissue or biological organisms in a given area.
There are two types of food chains :
- DFC (detritus food chain) - It begins with dead and decaying organic material. Decomposers like bacteria and fungi (heterotrophic organisms) meet their energy requirements by degrading this dead organic matter (detritus).
- GFC (grazing food chain) - It begins with autotrophs like green plants, cyanobacteria, etc., that are able to synthesise their own food by photosynthesis and pass on the energy to herbivores and further to carnivores.
A food chain refers to the sequence of organisms where one living organism eats another. It also shows the flow of nutrients and energy from one organism to another at different trophic levels in a food chain.
Different organisms occupy different levels in the food chain and each level is referred to as trophic levels.
Each trophic level has a certain mass of living material at a particular time called the standing crop. The standing crop is measured as the mass of living organisms (biomass) or the number in a unit area. For example, crops in the field, fishes in a pond, etc. Hence option d is correct.
Biomass refers to the mass or weight of living tissue or biological organisms in a given area.
There are two types of food chains :
- DFC (detritus food chain) - It begins with dead and decaying organic material. Decomposers like bacteria and fungi (heterotrophic organisms) meet their energy requirements by degrading this dead organic matter (detritus).
- GFC (grazing food chain) - It begins with autotrophs like green plants, cyanobacteria, etc., that are able to synthesise their own food by photosynthesis and pass on the energy to herbivores and further to carnivores.
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