What percentages of $PAR$ can be captured by plants?

Which one of the following statements is incorrect for secondary succession?

Which ecosystem shows maximum genetic diversity

Given below are four statements $(a-d)$ each with one or two blanks. Select the options which is correctly fill up the blanks into two statements.

$(a)$ Ecological succession is a…$(i)$… and fairly predictable changes in the ….$(ii)$… of a given area

$(b)$ Ecological succession, entire sequence of communities that successively change in given area are called …$(i)$….

$(c)$ Primary succession occurs on…$(i)$…

$(d)$ Secondary succession is …$(i)$… than primary succession

How much portion of the Photosynthetically Active Radiation $(PAR)$ is captured by the plants?