Exam 56: Community Ecology

Chemical compounds produced by plants that are not components of major metabolic pathways.

When there are high levels of disturbance in a community, the number of K-selected species should increase along with the overall diversity of the community.

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

The difference in the fundamental niche and the realized niche is

Competition between species is called ____________ competition.

Cardiac glycosides, molecules causing a drastic effect on vertebrate heart function, are produced as defensive chemicals by plants belonging to

Which of the following statements accurately reflects the differences between Batesian mimicry and Müllerian mimicry?

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)

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

Chemical defenses are found in all of the following except

Which of the following is an example of commensalism?

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

A species that plays a critical role in maintaining the structure of an ecological community and helps to determine the types and numbers of various other species in the community is known as

Resource partitioning would be most likely to occur between allopatric populations of species with similar ecological niches.

Which statement correctly interprets the graph?

Lakes become eutrophic by

You have been studying the relationship between jackals and tigers in India.Until recently, the only relationship you have observed is that jackals will associate themselves with a particular tiger and follow it at a safe distance in order to feed on the big cat's kills.However, recently you observed a jackal alerting a tiger to a kill with a loud cry.If you continue to observe this alerting behavior, you might change the categorization of the jackal/tiger relationship from ___________ to __________________.

The actual niche the organism is able to occupy in the presence of competitors is called its

Cattle egrets follow African ungulates such as African buffalo around and catch insects that the buffalo flush out.Oxpeckers perch on the backs of buffalo and feed on ectoparasites that infest the buffalo.Which one of the following shows the ecological interaction that the buffalo has with each bird?

Aposematic, or warning coloration, serves to protect an animal or plant by signaling to potential ________ to stay away.