Exam 55: Community Ecology

Which statement correctly interprets the graph?

Insects that lay eggs on living hosts are called

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

All organisms living together in a place are called a

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

Mimicry is a form of camouflage.

Lakes become eutrophic by

The way in which an organism utilizes its environment may be called

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

Adaptation that enables organisms to blend into their environment thereby avoiding predation.

Forests,like other ecological systems,are subject to the species succession process.Which of the following would be characteristics of pioneer plant species facilitating the early stages of forest succession? (Check all that apply) A)slow-growing B)pollinated by animals C)seedling growth requires direct sunlight D)seeds germinate in the shade E)plants produce great quantity of seeds

Competition shapes communities because there are usually limited

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

A ________ relationship is one in which two or more kinds of organisms live together in often elaborate and more or less permanent association.

Which of the following statements about the fundamental and realized niche are true? Check all that apply.

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 are most visually sensitive to the color red.Hummingbird flowers are pollinated by hummingbirds.Which of the following features of these flowers would indicate they have coevolved with hummingbirds? (Check all that apply)

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

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 ________.

Which statement is the correct interpretation of the graph?

Chemical defenses are found in all of the following except