The phosphorus cycle differs from those of carbon and nitrogen as well as those of sulphur, oxygen and hydrogen in that it lacks
Water
Dust particles
Gaseous phase
All above
In an ecosystem the rate of production of organicmatter during photosynthesis is termed as
Plants adapted to grow in shade are
The plants in which vascular tissues are absent and well developed aerenchyma is present, are
Biological equilibrium is found among the
Eutrophic lakes means