Exam 35: An Interactive Living World 2: Communities in Ecology

Many bromeliads are epiphytes on the bark of tropical trees.They do not tap into the vascular system of the trees,but they collect the nutrient-rich water that drips through the canopy of the trees.This is an example of:

Pioneers are the first invaders of a newly exposed habitat.

Commensalism often results in competitive exclusion.

Ecological dominants are always the most abundant members of a community.

Choose the characteristic associated with a top predator who is also a keystone species.

Competitive exclusion of native organisms is a frequent result of the introduction,by humans,of non-native organisms to an environment.

G.F.Gause's experiments with interaction of Paramecium caudatum and P.aurelia resulted in his describing the principle of ________.

When two species,such as bees and angiosperms,both benefit from their interdependent relationship,this is referred to as ________.

Explain the differences between a primary succession and a secondary succession.Give an example of each type of succession.

Parasites usually kill their hosts.

Barnacles live on exposed rocks washed over by waves at the shore.This is a description of the barnacles':

The "occupation" of a species in an area is identified as its:

Which of the following is an example of coevolution?

Barnacles are filter-feeding molluscs that live by filtering plankton from seawater.This is a description of the barnacles':

Batesian mimicry involves several harmful species evolving the same kind of characteristics.

The coral organisms on a coral reef cannot be replaced by any other organism.For that reason,we identify those species as:

The population of a carnivore has doubled this year.Predict what will likely happen to the population of its prey over the next 12 months.

The "address" where a species lives within a certain area is identified as its:

Many farms in New England were abandoned in the 1800s as settlers reached the more fertile grasslands of the Midwest.These farms had been planted in different crops,but within five to ten years the farms appeared to have similar herbaceous and small tree species on them.This is an example of:

Genetic diversity may be one of the characteristics of a biologically diverse community.