SAT Subject Biology Practice Question 204: Answer and Explanation

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Question: 204

14. Which of the following leads to a replacement of the plant community in an ecosystem undergoing succession?

A. Pollution
B. Herbivory
C. Parasitism
D. Abiotic factors
E. Intraspecific competition

Correct Answer: D


In ecological succession, a plant community is replaced by a subsequent plant community. This occurs because the plants in the original community alter abiotic factors, such as shade and soil nutrients, making the ecosystem more suitable for the seeds of different plant species.

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