Which ecosystem has the highest biomass?

In a forest, the clear vertical arrangement of plant growth forms according to their light needs is known as $........$

Sun is the only source of energy for all ecosystems on the earth $EXCEPT$ for . . . . . . .

What will be the $P/R$ ratio of a climax community and a pioneer community? What explanation could you offer for the changes seen in the $P/R$ ratio of a pioneer community and the climax community?

How many types of food chains are there in an ecosystem?

Which of the following has the largest biomass of autotrophs in the world's oceans?