Identify the correct statement:

1.	Eutrophic lakes contain fewer nutrients than oligotrophic lakes.
2.	Xerarch succession is a primary succession that occurs in water bodies.
3.	Most ecologists believe that most communities achieve stable, unchanging climax vegetation.
4.	A mature ecosystem has greater species richness, greater biomass, and less net productivity than a younger stage of succession.

A species that has a disproportionately large effect on its natural environment relative to its abundance is called as:

Competitors can coexist indefinitely only by:

Population size is unlikely to be limited by:

Rapid loss of nutrients from terrestrial ecosystems is not caused by:

The consequences of high population density of a population will include all except:
1. toxic waste accumulation
2. an increase in mortality
3. ignorance of overabundant prey by the predators
4. a reduction in reproduction

The endosymbiosis between early eukaryotes and the prokaryote lineage would be an example of:

Which of the following links ecology to population genetics and evolution?

Under a particular set of selection pressures, organisms evolve towards the most efficient:

The invasive prickly pear cactus in Australia was brought under control with the help of: