The trophic level of Cuscuta, Orobanche and Albugo is
Which of the following is source of energy to an ecosystem
Major conduit of energy in land and aquatic ecosystem is transferred through ______ and ______ respectively.
The amount of organic matter stored by green plants in a unit time and area is called
In ecological pyramid the base always represent the $...A...$ and the apex represents $...B...$ Here $A$ and $B$ represents