Plants capture only.................percent of $PAR$
$2-10$
$10-12$
$15-20$
$1-2$
Why are oceans least productive ?
Primary producer of an ecosystem is
Mr. $X $ is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying
Which of the following food chain may not be directly dependent upon solar energy
Assertion : In a food chain, members of successive higher levels are fewer in number.
Reason : Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level.