Ecosystem Dynamics USBT

Which of the following processes removes carbon from the atmosphere?

• Photosynthesis

• Combustion

• Decomposition

• Respiration

What are the two main processes that add carbon to atmosphere?

• Respiration

• Combustion

• Decomposition

• Photosynthesis

Which of the following are reactants of photosynthesis?

• CO₂ and H₂O

• O₂

• H₂O and Glucose

• None of the above

Fungi break down dead organisms, or waste products of living organisms, returning nutrients to the soil.  What role do fungi play in food webs?

• primary consumer
• producer
• secondary consumer
• decomposer

True or False: All of the carbon in existence is continually recycled in the carbon cycle.

• True
• False

What are the four most important materials needed by living organisms?

• water, carbon, oxygen, nitrogen
• water, food, oxygen, carbon
• water, carbon, nitrogen, phosphorous
• water, carbon, food, phosphorous

Regions of the Earth crust, waters and atmosphere inhabited by living things                     

• Biosphere
• ecosystem
• population
• cell

All weather phenomena are present in stratosphere layer.

• True

• False

All the atmospheric phenomena on the Earth like the rains take place in ........... layer.

• mesosphere

• stratosphere

• thermosphere

• troposphere

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