Question

Choose the correct statement:

• A. Primary succession starts from soil
• B. Secondary succession starts from newly cooled lava
• C. Primary succession starts from bare rock
• D. Secondary succession starts from reservoirs

Hint:

Primary succession = begins where soil is absent. Secondary succession = begins where soil is already present. This single distinction is enough to solve most ecology MCQs.

Answer 1

The Correct Option is C

Concept: Ecological succession is the gradual replacement of one community by another over time. It is of two types:
• Primary succession
• Secondary succession

Step 1: Understand Primary Succession. Primary succession begins on a surface where no life previously existed. Examples:
• Bare rock
• Newly formed volcanic surfaces
• Sand dunes Thus, \[ \boxed{\text{Primary succession starts from bare rock}} \]

Step 2: Understand Secondary Succession. Secondary succession begins where a previous community existed but was destroyed. Examples:
• Burnt forests
• Flood affected areas
• Abandoned agricultural fields Therefore Option (B) is incorrect because newly cooled lava represents primary succession.

Step 3: Evaluate all options.
• (A) False
• (B) False
• (C) True
• (D) False Hence the correct answer is: \[ \boxed{\text{Primary succession starts from bare rock}} \]