Exam 55: Community Ecology

Succession happens because species in the habitat alter that habitat in ways that assist other species.There are three dynamic concepts that are of critical importance for succession to take place.They are

It is a situation in which a palatable organism resembles another kind of organism that is distasteful or toxic.

In ________ mimicry,two or more unrelated but protected species resemble one another,thus achieving a kind of group defense.

Communities evolve to have greater biomass and species richness in a process called

Which of the following statements about mimicry are true? Check all that apply.

Interspecific competition can affect the phenotypic characteristics of organisms.

A relationship in which both members benefit is called

In ________ mimicry,unprotected species resemble others that are distasteful.

Chemicals that play the dominant role in protecting plants from being eaten by herbivores or predators are called

Following their respective breeding seasons,several species of hummingbirds occur at the same locations in North America and several hummingbird flowers bloom simultaneously in these habitats.These flowers seem to have converged to a common morphology and color.Birds have the most visual sensitivity to the color red.Following their breeding season,these species of hummingbirds are

Two of Darwin's finches display a character displacement when they occur as sympatric species.Which of the statements correctly interprets the graph?

Which of the following examples would be undergoing secondary succession? Check all that apply.

In general,communities in early succession will be dominated by fast-growing species with r-selected life histories.

Paleontological studies indicate that,over millions of years,

The difference in the fundamental niche and the realized niche is

Alligators excavate holes in the bottom of bodies of water.During times of severe drought these holes act as refugia for various aquatic organisms that might perish if there were no water available.Thus,alligators in this system can be classified as a(n)

In studies of two species of barnacles in the marine intertidal zone it was observed that Chthamalus can live in the upper intertidal zone and the lower intertidal zone if Semibalanus is absent,and Semibalanus can only live in the lower zone because it is more subject to dehydration.Based on this,which of the following statements are true? Check all that apply.

Which of the following is an example of commensalism?

Based on the following graph,what is the most likely relationship between Paramecium and Didinium?

Geographical allopatry between species is definitive evidence of interspecific competition.