In the phosphorus cycle, phosphate becomes available by weathering of rocks first to

From the above given features,how many are associated with primary succession?
Features:
$1$. Occur on newly cooled lava
$2$. Faster succession
$3$. Progress to mesic condition
$4$. Occurs on flooded land
$5$. Slower succession
$6$. Changes in flora only

Identify the correct sequence of development of a stable community (climax community) starting from a new area (primary succession).

$A$ food chain consists of:

Which one statement is correct regarding man-made ecosystems?

Which of the following statements is true for an ecosystem?