Question

how are primary and secondary succession different?
d. secondary succession begins with lichens, and primary succession begins with mosses.
b. secondary succession starts on rock but primary succession starts on areas where soil is present.
a. primary succession occurs slowly, but secondary succession occurs more rapidly.
c. primary succession changes the environment, but secondary succession does not.

Explanation:

• Option D: Lichens are pioneer species in primary succession, and mosses come later, so this is incorrect.
• Option B: Primary succession starts on bare rock (no soil), secondary on areas with soil (after disturbance), so this is reversed and incorrect.
• Option C: Both primary and secondary succession change the environment, so this is incorrect.
• Option A: Primary succession starts from bare rock, so it's slow as soil needs to form. Secondary succession starts on soil (from a disturbed area with existing soil), so it's faster. This is correct.

Answer:

A. Primary succession occurs slowly, but secondary succession occurs more rapidly.