Exploring Biogeochemical Cycles in Biology

What are the two main ways water rises into the atmosphere in the water cycle?

• Sublimation and deposition

• Evaporation and transpiration

• Condensation and precipitation

• Infiltration and runoff

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What is the primary role of stomata in plants during the water cycle?

• Absorb sunlight

• Release water vapor

• Store nutrients

• Produce glucose

In the oxygen cycle, what process do plants use to take in carbon dioxide and release oxygen?

• Fermentation

• Cellular respiration

• Transpiration

• Photosynthesis

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Why is carbon essential for living organisms?

• It is a waste product of respiration

• It is a primary component of water

• It forms the basis of organic molecules

• It is used in photosynthesis

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What is the main consequence of burning fossil fuels on the carbon cycle?

• Reduced water vapor

• Increased oxygen levels

• Decreased nitrogen levels

• Excess carbon dioxide release

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Why is phosphorus important for living organisms?

• It is a component of glucose

• It is needed to make ATP and DNA

• It is used in cellular respiration

• It is a waste product of photosynthesis

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How do human activities like using fertilizers impact the phosphorus cycle?

• They enhance water evaporation

• They increase oxygen levels in water

• They cause algal blooms and eutrophication

• They reduce soil nitrogen levels

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What is the process called when soil bacteria convert nitrogen gas (N2) into ammonium (NH4)?

• Ammonification

• Nitrification

• Denitrification

• Nitrogen fixation

What role does lightning play in the nitrogen cycle?

• It fixes nitrogen into the soil

• It breaks apart nitrogen and oxygen molecules

• It converts ammonium into nitrates

• It denitrifies the soil

Which process in the nitrogen cycle involves converting nitrates (NO3) back into nitrogen gas (N2)?

• Nitrogen fixation

• Ammonification

• Nitrification

• Denitrification