Benthic organisms are affected the most by

The organisms dwelling at the bottom of a lake are called

Green plants constitute

Which one of the following contains very low concentrations of dissolved inorganic nutrients for algal growth?

Classify the following ecosystems into their appropriate groups:
$I-$ Forest,$II-$ Grassland,$III-$ Pond,$IV-$ Desert
$V-$ Lake,$VI-$ Wetland,$VII-$ River,$VIII-$ Estuary
Terrestrial Ecosystem $\quad$ Aquatic Ecosystem

Plants capture only ................. percent of $PAR$ (Photosynthetically Active Radiation).