The phenomenon of character displacement is seen in:
1. sympatric species
2. allopatric species
3. primary succession
4. secondary succession

A form of mimicry where a harmless species has evolved to imitate the warning signals of a harmful species directed at a predator of them both is called:
1. Mullerian mimicry
2. Batesian mimicry
3. cryptic coloration
4. disruptive coloration

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:

Semelparous organisms:
1. produce young only late in life
2. produce a large batch of young and die
3. produce young over most of their life
4. produce a single offspring near the end of their reproductive potential

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 survivorship curve of humans is:
1. Type I
2. Type II
3. Type III
4. Type IV

Study the four statements (a-d) given below and select the two correct ones out of them:

The two correct statements are: