Biologyhard · Past Paper
Which of the following is a 'Top-down' control in an ecosystem?
ANutrient availability limiting plant growth
BPredators controlling the herbivore population
CRainfall determining the type of biome
DSunlight affecting the rate of photosynthesis
✓ Correct Answer: B — Predators controlling the herbivore population
Top-down control occurs when predators limit the density or behavior of their prey, affecting lower trophic levels.
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