In the phosphorus cycle, phosphate becomes available by weathering of rocks first to
Consumers
Producers
Decomposers
None of these
Energy enters into the ecosystem through
Frog, that feeds on insects, is a
Which of the following food chain may not be directly dependent upon solar energy
What do ecologists call the transfer of energy that begins with the sun and passes from one organism to the next in a food chain?
The mass of living material at a trophic level at a particular time is called