What are the essential elements required by organisms for their body-building and metabolism called?

All successions whether taking place in water or on land proceed to a similar climax community which is </h2…

What is the missing level of the organization? Grass → Grasshopper → ? → Man

Who replaces the reed-swamp in a hydrarch succession?

Which of the following ecological food chain does not represent an erect pyramid of numbers?</h2></div>

Water requirement of Kangaroo/Desert rat is largely met by<span><br> </span></h2></div>

Secondary succession takes place on/in</h2></div>

Pyramid of energy (in a forest/pond ecosystem) is<span><br> </span></h2></div>