AP BIOLOGY

Detailed explanation-1: -Secondary succession occurs when the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site. Many different kinds of disturbances, such as fire, flooding, windstorms, and human activities (e.g., logging of forests) can initiate secondary succession.

Detailed explanation-2: -Secondary succession begins on existing soil. Pioneer species in secondary succession are small, fast growing plants that make many seeds. Next, taller plants and shrubs shade out, or grow around and above, the pioneers. Then, tree seedlings appear.

Detailed explanation-3: -Secondary succession begins in areas where natural biotic communities have been destroyed such as in abandoned farm lands, burned or cut forests, lands that have been flooded.

Detailed explanation-4: -Secondary succession occurs in areas that somehow, lost all the living organisms that existed there. Secondary succession begins in areas where natural biotic communities have been destroyed such as in abandoned farm lands, burned or cut forests, lands that have been flooded.

Detailed explanation-5: -Secondary succession begins in areas where natural biotic communities have been destroyed, such as in abandoned farmlands, burned or cut forests, lands that have been flooded. Since some soil or sediment is present, secondary succession is faster than primary succession.