What do we call a progressive series of changes that produces a climax community on what was once a bare, rocky volcanic island?

Within an ecosystem, which group of organisms provides energy to all other organisms?

In an energy pyramid, which level has the most amount of energy available to its organisms?

In an energy pyramid, which level has the least amount of energy available to its organisms?

A group of organisms of the same species that live in the same area

Wind is considered to be an abiotic factor because it

Ecology is the study of

Biodiversity is

What do all biotic and abiotic factors in a given area make up?

Which of the following is a biotic factor?

Which of the following would happen to a rural ecosystem if the grasses and shrubs were removed?

Which of the following is the best example of primary succession?

Some organisms cause decay by breaking down dead matter into raw materials. These organisms are called

The fundamental role that an organism plays within its ecosystem would be best described as its

The back and forth evolutionary adjustments between two or more species is known as

In this food web, the trophic level with the least energy includes which of the following organisms?

In this food web, the trophic level with the most energy includes which of the following organisms?

The organism in the terrestrial food web that corresponds to the krill in the marine food web is labeled X. Which organism is most likely X?

Use the food web to answer the following: If the population of rabbits is reduced by disease, which change will most likely occur?

Which of the following is most likely to lead to the greatest decrease in the mouse population?

A model that shows a single sequence of feeding relationships is a

A food chain contains oak trees, mice, black rat snakes, and bald eagles. How many trophic levels does this food chain have?

Why are decomposers important to ecosystems?

The basis for energy in an ecosystem?

Each level in a food chain contains less energy than the one below it because some energy is

Food webs are models that show

If producers have 10,000 kcal of energy available, how many kcal will be available for the primary consumers?

What was the wolf population in 1979?

Is the moose population in 1989 increasing or decreasing?

In 1979, was the moose population relatively high or relatively low?

The population size that an environment can sustain is known as its

In 2002, a Montana moss population had 15 members. Later that year, a new hunting camp opened up a few miles away. In the spring of 2003, 5 babies were born but 7 moose total died that year. What was the growth rate (r) of the population?

Which type of population growth is demonstrated by this graph?

Which type of population growth is demonstrated by this graph?

Aphids eat sap from the plants and excrete sticky waste that ants eat. The ants protect the aphids from predators. This type of interaction is called

Predation is best described as

An oak tree provided a sparrow a place to build a nest. The nest neither benefits nor harms the tree. What is the name for this type of relationship?

One difference between parasitism and predation is that parasites

Which of these is an example of parasitism?

Two robins eating worms on the same lawn is an example of

Cane toads are native to Hawaii but were introduced to Australia in the 1930s. They had no natural predators and bred rapidly. They are currently a problem and have significantly disrupted Australian ecosystems. Can toads are best described as

Identify where photosynthesis is occurring in this carbon cycle.

Identify where combustion of organic molecules returns carbon to the atmosphere.

Identify where respiration and breakdown of organic molecules for energy returns carbon to the atmosphere.