Energy contents of macrophytes may be estimated by
Calorimeter
Energy measuring apparatus
Oxygen bomb calorimeter
None of the above
The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What $(a), (b), (c)$ represent respectively ?
$(a)$ $(b)$ $(c)$
When births are equal to deaths. It is called
Carrying capacity of earth is
The apex of age pyramid of a stationary population is
In demography we study