1. describe the structure of an ecosystem, and indude a description of an ecological community provide and label a sketch (or explain) of a food web that you might find in a wetland, showing at least eight different organisms 2. what is one commonly used way to delineate the boundary of an ecosystem? provide an example of how ecosystem boundaries are sometimes transitional 3. 4 what is biomass? why does the energy content decrease at each higher level of a food chain? 5. briefly outline the stages in ecological succession for a specific environment (you can use an exampie from the book or provide your own.)

Select the correct text in the passage. the moving continents affect all subsystems on earth. which sentence identifies a potentially negative consequence of shifting continents? the supercontinent pangaea began to break up about 175 million years ago. [during this process, more coastline was exposed as the landmasses separated]. [the rearrangement and displacement of these huge landmasses resulted in the diversity of plants and animals we see on earth today]. [the movement of the plates sometimes leads to earthquakes and tsunamis]. however, over the long course of earth's history, their effects are usually minimal. in oceans, the plate movements usually lead to seafloor spreading. [seafloor spreading often results in the formation of underwater ranges of mountains].

After world war i, how did the us economy compare to that of germany?

The states that the process that have been occurring today have been occurring since earth formed. what is it?