| Direction: The following questions consist of two statements, one labelled the Assertion and the other labeled Reason (R). Examine these two statements carefully and decide if the Assertion and Reason (R) are individually true and if so, whether the Reason is a correct explanation of the Assertion. |
| A. An ecosystem is a self regulating association of living plants and animals and their nonliving physical environment. |
| R. In an ecosystem, a change in abiotic component causes changes in biotic components. |
A) Both A and R are true and R is the correct explanation of A.
B) Both A and R are true but R is not the correct explanation of A.
C) A is true but R is false.
D) A is false but R is true.
Correct Answer: B
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