Food webs and nutrient cycling

Example of autotroph is...

• lucerne
• fungus
• rackoon
• starfish
• vulture

What organisms help denitrification to happen?

• denitryfying bacteria
• fungi
• plants
• saprotrophs

What is the name of the process - ammonia changing to nitrate?

• ammonification
• nitrification
• denitrification

What is the average trophic efficiency while transferring energy from one level to another?

• between 5% and 20%
• 0.1
• 0.15
• between 10% and 15%

Which of these places stores the most carbon?

• Soil

• Atmosphere

• Biomass

• Hydrosphere

• Sedimentary rocks

What does limestone rock contain?

• calcium carbonate
• sodium carbonate
• potassium carbonate

How oil and natural gas are formed?

• from dead algae

• from dead zooplankton

• from the remains of<br /> terrestial plant material

• from the plant material which is not fully decomposed

What is the biggest carbon reservoir?

• soil
• deep oceans
• sedimentary rocks
• atmosphere
• biomass

In the food web, which organisms release the carbon from dead things back into the environment?

• consumers
• scavengers
• decomposers
• producers

What is the difference between a food web and a food chain?

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