Phosphorus is the major constituent of

$I.$ biological membranes

$II. $ nucleic acids

$III.$ cellular energy

Choose the correct option

Which of the following ecosystem types has the highest annual net primary productivity?

The phosphates remain outside the natural cycle for a long time

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

The plants in which vascular tissues are absent and well developed aerenchyma is present, are