Which of the following communities is more vulnerable to invasion by outsides animals and plants
Succession proceeds from
Tropical dense forest is due to
The phosphorus cycle differs from those of carbon and nitrogen as well as those of sulphur, oxygen and hydrogen in that it lacks
What will be the $P/R$ ratio of a climax community and a pioneer community. What explanation could you offer for the changes seen in $P/R$ ratio of a pioneer community and the climax community.