Question

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

Explanation:

Primary succession occurs in areas with no soil (like bare rock), starting from pioneer species such as lichens and mosses, and takes a long - time as soil has to be formed. Secondary succession occurs in areas where soil is already present (after a disturbance like a fire or flood in an existing ecosystem), so it is faster as there is already a soil base and seeds or root systems may remain.

Answer:

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