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प्रश्न
Answer the following question.
Define an ecosystem. Draw a block diagram to show the flow of energy in an ecosystem.
उत्तर
Ecosystem refers to the living and non-living components in an area and the interactions between them.
Energy flows across the trophic levels as shown in the diagram below, following the ten percent law. Only ten percent of the energy available to a trophic level is passed on to the next trophic level. The remaining is dissipated away. 
Assuming 10000 J is the energy available to the producers, then 1000 J will be available to the primary consumers, 100 J will be available to secondary consumers and 10 J will be available to tertiary consumers.
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संबंधित प्रश्न
What is the functional unit of the environment comprising of the living and non-living components called?
In an ecosystem :
(i) the flow of energy is unidirectional
(ii) the flow of materials is unidirectional
(iii) the flow of materials is cyclic
(iv) the flow of energy is cyclic.
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (i) and (iii)
Answer the following question.
Write the different components of a lac-operon in E. coli. Explain its expression while in an ’open’ state.
Define the term 'ecosystem'.
What are the two types of ecosystems?
What are energy components?
Fish and other water creatures and plants are maintained in the terrarium.
If we protect the ecosystem, we can reduce waste by using durable goods.
Define – Aquarium.
Which are the major producers in an aquatic ecosystem?
