Succession is
Series of physical changes that occur in an area
Development of biotic communities on a bare area
Series of biotic communities that appear in a previously bare area
Both $ (a) $ and $(b)$
The phosphorus cycle differs from those of carbon and nitrogen as well as those of sulphur, oxygen and hydrogen in that it lacks
Excessive aerenchyma is characteristic of
Nitrates are transformed into nitrogen by
The plants in which vascular tissues are absent and well developed aerenchyma is present, are