Ecology Unit Test Review

This curve is typical of invertebrates, fish, amphibians, and plants. These organisms have large numbers of offspring, or produce many eggs or seeds. Many of the offspring will die from predation, but a few will survive to adulthood.

• Type I

• Type II

• Type III

• Type IV

What are the two quantities of measurement needed to calculate population density?

• area and carrying capacity

• number of individuals and area

• number of individuals and carrying capacity

• carrying capacity and population size

This curve is typical of humans and other large mammals. There are few deaths, of infant organisms and most will survive to old age. These organisms tend to have parents that care for their young

• Type I

• Type II

• Type III

• Type IV

Which of the following describes a species that is spread out by random dispersion in an area?

• many fish species swim together in large groups to avoid predators

• many bird species are territorial, each protecting its own space

• three-toed sloths have almost no competitors and few predators

• love-bugs are attached and occupy space as a couple

Which of the following describes a species that is spread out by clumped dispersion in an area?

• many fish species swim together in large groups to avoid predators

• many bird species are territorial, each protecting its own space

• three-toed sloths have almost no competitors and few predators

• love-bugs are attached and occupy space as a couple

This curve is typical of birds, small mammals, and some reptiles. At all points of life, these organisms have equal chances of living or dying, either from disease or predation

• Type I

• Type II

• Type III

• Type IV

Which of the following describes a species that is spread out by uniform dispersion in an area?

• many fish species swim together in large groups to avoid predators

• many bird species are territorial, each protecting its own space

• three-toed sloths have almost no competitors and few predators

• love-bugs are attached and occupy space as a couple

Which type of population dispersion would be beneficial for a species in which competition for resources is high?

• uniform: because the organisms are randomly arranged

• clumped: because the organisms are arranged closely together

• random: because the organisms are arranged closely

• clumped: because each group would not want to share resources with the neighboring group

The natural reservoir of phosphorus contains the element in the form of phosphates known as phosphorite. It contains almost 4% to 20% of phosphate. The source of the phosphorus found in the phosphorus cycle is.....

• atmospheric gases

• sedimentary rock

• water

• dead organisms

Which of the following is a description of a niche rather than a habitat?

• A mouse lives in a tree trunk.

• Hyenas eat dead animals and small rodents.

• The Hyenas stay in a cave.

• Some birds live in the tops of the trees in a nest.