How are the carbon, oxygen, and nitrogen cycles vital to sustaining life on earth?

What is the ecological role of food chains and food webs

What type of plant is good for a bioassay and where can i buy it? i only have a month.

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.