Introduction to Ecology

List the levels of organization from largest to smallest

• organism, population, community, ecosystem, biosphere

• biosphere, ecosystem, community, population, organism

• community, ecosystem, biosphere, population, organism

• population, ecosystem, community, population, organism

Which process involves plants having water leave via pores and move into the atmosphere, possibly drying them out.

• Condensation

• Evaporation

• Transpiration

• Precipitation

The most important factor in converting nitrogen into usable forms during the nitrogen cycle is...

• Animals

• Plants

• Bacteria

• Decomposers

Which of these nitrogen cycle processes converts atmospheric nitrogen to a soil form of nitrogen that is usable by plants?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

What is the original, and biggest reservoir of phosphorus on the planet?

• live plants and animals

• groundwater

• the atmosphere

• rocks

Which of the following statements is true of the phosphorus cycle?

• Phosphorus enters the atmosphere as phosphates.
• The phosphorus cycle utilizes the processes of erosion, and weathering.
• Phosphates are used in carbohydrate and glucose storage.
• The phosphorus cycle utilizes bacteria to breakdown phosphates and make them available for plants.

Respiration is the process by which animals take in _____ and release _____. 

• photosynthesis, air
• carbon, oxygen
• oxygen
• oxygen, carbon dioxide

Which of the following correctly shows an energy pyramid?

• A

• B

• C

• D

How much energy is transferred from one trophic level to the next in an energy pyramid?

• 1%

• 10%

• 100%

• 90%

Kilocalories (kCal) is a measure of energy. If there are 1000 kCal available for the producers in trophic level #1, how much energy is available for the secondary consumers trophic level #3? (Hint: use the Rule of 10s)

• 10 kCal

• 1 kCal

• 100 kCal

• 1000 kCal