Ecology Review

Which of the following is a correct representation of the organizational levels of a biological system?

• Ecosystem-->Biosphere-->Population--> Community

• Community-->Population-->Biosphere-->Ecosystem

• Biosphere-->Ecosystem-->Community-->Population

• Population-->Community-->Ecosystem-->Biosphere

Look at the food web shown above. Determine how much energy the chameleon would get from the caterpillar if the leaf provided the caterpillar with 100% of energy for this food chain.

• 100%

• 10%

• 1%

• .1%

Which organism in this food web can be classified as more than one trophic level?

• Grasshopper

• Frog

• Owl

• Mouse

If the population size of deer decrease due to overhunting, what would happen to the population size of the mountain lion?

• It would increase due to decreased competition

• It would decrease due to increased competition

• It would increase due to an increase in food

• It would stay the same because its food is not affected

A spieces of bacteria lives in human intestine. The bacteria get food and a place to live while people get vitamins from the bacteria. What type of ecological relationship is this?

• Commensalism

• Mutualism

• Parasitism

• Competition

The "X" in this energy pyramid is showing what is lost to the environment at each trophic level of this ecosystem. What does "X" represent?

• Nutrients in the soil

• Heat loss

• Food sources

• Living space for organisms

Where is the greated concentration of the PCB toxin found in this food chain?

• Producers

• Primary consumers

• Secondary consumers

• Tertiary consumers

Which of the following describes the stage of succession that is likely to have the most species divesity?

• A newly formed volcanic island

• An agricultural field that has not been plowed

• A field that is mowed regularly

• A temperate forest that has never been cleared

Parrotfish graze with rabbitfish to avoid predation since the rabbitfish is venomous. The rabbitfish does not benefit but the parrotfish gets protection. What type of symbiotic relationship is this?

• Commensalism

• Mutualism

• Parasistism

• Competition

The diagram shows the flow of organic molecules through an ecosystem. One process is labeled X and the other is labeled Y. What are the 2 processesidentified as X and Y?

• X-Respiration & Y-Predation

• X-Adaptation & Y-Decomposition

• X-Fermentation & Y-Nitrogen fixation

• X- Decomposition & Y-Respiration