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Solution


Q.

Four students gave 4 different statements about ecosystem. Who is incorrect

Student A: “Energy can be recycled in an ecosystem.”
Student B: “Matter cannot be recycled in an ecosystem.”
Student C: “Energy cannot be recycled but matter can be recycled in an ecosystem.”
Student D: “Neither energy nor matter can be recycled in an ecosystem.”
1 Both students A and B  
2 Students A, B and D  
3 Student C  
4 Students A and C  

Ans.

(2)

In an ecosystem, the sun is the only source of energy. The energy is not recycled, but the organic matter, which passes from one trophic level to the next, is recycled by the action of decomposers.