Question

The gradual and predictable change in species composition in an area is known as:

• A. Succession
• B. Evolution
• C. Mutation
• D. Speciation

Hint:

*Key takeaway:* Succession = gradual change in species composition over time. Primary succession starts from bare rock, while secondary succession occurs in areas with existing soil.

Answer 1

The Correct Option is A

To solve the problem, we need to understand the term used to describe the gradual and predictable change in species composition in a particular area over time.

1. Understanding the Concept:

- In ecology, areas undergo changes in the types of species living there due to environmental factors, disturbances, and biological interactions.
- This process happens gradually and follows a predictable pattern, leading to the development of a stable community.

2. Key Term:

- This gradual and predictable change is called ecological succession.
- Ecological succession can be of two main types:
   • Primary Succession: Occurs in lifeless areas where no previous community existed (e.g., after volcanic eruptions).
   • Secondary Succession: Occurs in areas where a community previously existed but was disturbed or destroyed (e.g., after forest fires).

Final Answer:

The gradual and predictable change in species composition in an area is known as ecological succession.