How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?
$1 \%$
$10 \%$
$40 \%$
$90 \%$
During the process of ecological succession the changes that take place in communities are
orderly and sequential
random
very quick
not influenced by the physical environment
Climax community is in a state of
non-equilibrium
equilibrium
disorder
constant change
Among the following bio-geo-chemical cycles which one does not have losses due to respiration?
Phosphorus
Nitrogen
Sulphur
All of these
The sequence of communities of primary succession in water is
Phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses and trees.
Phytoplankton, free-floating hydrophytes, rooted hydrophytes, sedges, grasses and trees.
Free-floating hydrophytes, sedges, phytoplankton, rooted hydrophytes, grasses and trees.
Phytoplankton, rooted submerged hydrophytes, floating hydrophytes, reed swamp, sedges, meadow and trees.