Statement I is incorrect: Secondary succession is actually faster than primary succession. Because soil or sediment is already present, plants can recolonise the area much more quickly than on bare, lifeless surfaces.

Statement II is incorrect: The description provided actually defines secondary succession, not primary succession. Primary succession begins in entirely lifeless areas (like bare rock or newly cooled lava) where no soil exists. Secondary succession is what happens in areas where a previous community was destroyed but the soil remains.

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