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For an ecosystem, the two main structura...

For an ecosystem, the two main structural features are-
(i) species composition
(ii) Energy flow
(iii) Decomposition
(iv) Stratification

A

I and iv only

B

ii and iii only

C

i only

D

ii , iii and iv only

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the two main structural features of an ecosystem, we will analyze each option provided and determine which two are correct. ### Step-by-Step Solution: 1. **Understanding Ecosystem Structure**: - An ecosystem consists of both living (biotic) and non-living (abiotic) components that interact with each other. The structure of an ecosystem refers to the organization of these components. 2. **Evaluating Each Option**: - **(i) Species Composition**: - This refers to the variety and abundance of different species present in a community. It is indeed a structural feature as it describes the identity of species and their interactions within the ecosystem. - **(ii) Energy Flow**: - This refers to the transfer of energy through the ecosystem, primarily from producers to consumers and then to decomposers. While energy flow is crucial for ecosystem functioning, it is not considered a structural feature; rather, it is a functional aspect of ecosystems. - **(iii) Decomposition**: - Decomposition is the process by which dead organic matter is broken down into simpler substances. Similar to energy flow, it is a process that occurs within ecosystems but does not describe the structure of the ecosystem itself. - **(iv) Stratification**: - Stratification refers to the vertical layering of different habitats within an ecosystem, such as in forests where there are distinct layers (canopy, understory, forest floor). This is considered a structural feature as it describes how different layers of the ecosystem are organized. 3. **Identifying the Correct Features**: - From the evaluation, we can conclude that the two main structural features of an ecosystem are: - **Species Composition (i)** - **Stratification (iv)** 4. **Final Answer**: - Therefore, the correct answer is (i) Species Composition and (iv) Stratification.
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