BSEB Inter Exam Biology Ecosystem Chapter Wise Subjective Question
1. Distinguish between :
(A) Grazing food chain and detritus food chain.
(B) Production and Decomposition.
(C) Upright and Invested Pyramids.
Ans.- (A) Grazing food chain and detritus food chain.
2. What is food web? Name the organisms of two food chains in a terrestrial ecosystem.
Ans.-There are many types of food chains in the ecosystem, but these food chains are not independent. Food web is a network of food chains which become interconnected at various trophic levels so as to form a number of feeding connections amongst the different organisms of a biotic community. Normally a food web operates according to taste and food preferences of the organisms at each trophic level. However, availability at each trophic level. In Sunderbans, the tigers eat fish and crab in the absence of their natural preys. Some organism normally operate at more than one trophic level. Snakes feed on mice as well as frogs. Wild cats prey upon mice as well as birds and squirrels. A wolf eats not only fox but also rabbit and deer.
Marshy plants are eaten by various insects.
Two food chains in a land ecosystem.
3. Differentiate following:
(A) Food chain and food web,
(B) Litter and Detritus,
(C) Primary and Secondary Productivity,
Ans.- (A) Differentiate between food chain and food web.
4. Write short notes on Fisheries.
Ans.- Fisheries : The science of producing fish and other aquatic resources for the purpose of providing human food, although other aims are possible (such as sport or recreational fishing), or obtaining ornamental fish or fish products such as fish oil. Learn more in: The CGIAR Virtual Library Bridging the Gap Between Agricultural Research and Worldwide Users The activity of catching fish and other living organisms from the wild aiming to be consumed as seafood. Fisheries are harvested for their value either commercial, recreational, or self-consumption.
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