Exam 27: Community Interactions

A species that plays a major role in determining the structure of its ecological community is:

In the interactions among the tree-dwelling black ants, the roundworms, and the birds, the roundworms are the:

Over the course of their evolutionary histories, the timing of flowering, the spacing of plants, and the nectar rewards of flowering plants have influenced the foraging behavior of bees, which in turn has influenced the morphology of flowers. This process is an example of:

The Masai people of Africa regularly consume the blood and milk of their cattle. The cattle derive a net benefit because the Masai also protect them from predators and help them find water and food. Given this additional information, the relationship is best classified as:

The spotted brown and black coats of mountain lion cubs are ________, which makes them difficult for predators to find.

The community that tends to persist in an area after succession is known as the ________ community.

The biotic portion of an ecosystem includes the plants, animals, and microbes. True or False?

In the interactions among the tree-dwelling black ants, the roundworms, and the birds, the ants are the ________ for the roundworms.

Nitrogen-fixing bacteria get both a place to live and energy while supplying nitrogen to a plant. What is this ecological relationship called?

Succession that begins on bare rock after glaciers have passed, or on newly formed volcanic islands, is:

An effective, bright, and very distinct color pattern that a prey species can display suddenly to scare a predator is called:

The rocks and weather that influence succession are examples of ________ factors.

Tapeworms in the human gut are an example of:

Trees often produce secondary chemicals to deter herbivores from feeding on their leaves; in turn, many herbivores have developed ways of avoiding or detoxifying these chemicals. This is an example of:

In ________, the interaction between two species harms both of them.

The most common pioneer species are mosses and lichens. True or False?

Invasive species outcompete native species because they lack predators and have high reproductive rates. True or False?

What is the relationship between an ecosystem and a community?

________ are organisms that eat plant material.

When a community like the tallgrass prairie is maintained by regular disturbances such as periodic fires set by Native Americans or by lightning, a ________ community exists.