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Which is true regarding gross and net primary productivity (GPP and NPP)?

Compare these two food chains:           algae –> water fleas  –> fish  –> green herons         trees –> tent caterpillars –> red-eyed vireos –>  hawks   Both water fleas and tent caterpillars are… [check all that apply]

In an ecosystem, we generally expect there to be more individuals that are __________ than are  __________.

If the secondary consumer trophic level of a terrestrial ecosystem contains 1000 joules, then a reasonable estimate for the energy content of the tertiary consumer trophic level would be:

A community with many different species but few individuals of all species except for one exhibits:

In the facilitation model of succession, climax communities are typically reached:

According to the competitive exclusion principle:

Given the following, which diagnosis is most likely? CVP = 18 mmHg PCWP = 24 mmHg BP= 70/50

In Island Biogeography theory, island size affects ________ rate, whereas the distance from the mainland affects __________________ rate. (this is answerable in as few as 2 words). 

Environmental pollution is the single most important factor in contributing to the cause of species endangerment.