Which of the following ecosystems lack one or more structural components?
(1) Deep sea
(2) Freshly formed rain water pond
(3) Forest ecosystem
(4) More than one option is correct.
Answer is (4). How is it? What are the structural components?

Dear student, 

There are certain ecosystems that lack one or more basic four components of the ecosystem, i.e., Producers, consumers, decomposers or the abiotic factors. Thus, these ecosystems are known as incomplete ecosystems.
Here, Option 1 and 2 fulfills the situation ,i.e., in these ecosystems the green plants can generally not survive but other components like consumers and decomposers are there.


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