Question

1. a type of succession that occurs on a surface where no ecosystem existed before is ____ succession. 9. after a forest fire, __ succession occurs. 10. secondary succession is typically completed in less time than primary succession because there is ____ present in the habitat to begin with.

Explanation:

• Question 8: Primary succession occurs on a surface where no ecosystem existed before. This is because primary succession starts with bare rock or a newly formed area with no soil or organisms initially.
• Question 9: After a forest fire, secondary succession occurs. Secondary succession happens in an area where a disturbance (like a fire) has destroyed an existing ecosystem but left the soil intact with seeds, roots, and other remnants of the previous community.
• Question 10: Secondary succession is typically completed in less time than primary succession because there is soil present in the habitat to begin with. Soil contains nutrients, seeds, and other components that allow plants and other organisms to establish more quickly compared to primary succession where soil has to be formed from scratch (e.g., through weathering of rock and the action of pioneer species like lichens).

Answer:

1. primary
2. secondary
3. soil