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Q.

Which statements are correct from the following?

a) Energy flow in an ecosystem is not exempt from second law of thermodynamics.

b) In an ecosystem, energy flow is unidirectional.

c) Ecosystem is composed of only abiotic factors.

d) Pond is a lotic ecosystem.

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a

b and d

b

c and d

c

a and b

d

b and c

answer is B.

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Detailed Solution

Ecosystem is composed of both biotic and abiotic factors.  

Pond is lentic (still water) ecosystem. it is not a lotic (flowing) ecosystem.

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