Exploring Biogeochemical Cycles and Nutrient Flow

What does the term 'biogeochemical cycles' refer to?

• The process of photosynthesis

• The water cycle

• The formation of rocks

• The movement of chemicals from living to non-living things and back

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Why is carbon essential for life?

• It provides energy directly

• It forms the backbone of organic molecules

• It is a major component of water

• It is used in cellular respiration

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What role does hydrogen play in biological systems?

• It is a key component of water and energy transfer

• It is a major component of the atmosphere

• It is used in the formation of proteins

• It forms the backbone of DNA

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Which element is crucial for the formation of amino acids and proteins?

• Phosphorus

• Oxygen

• Carbon

• Nitrogen

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What is the significance of sulfur in proteins?

• It forms disulfide bridges that stabilize protein structure

• It is used in cellular respiration

• It is a component of ATP

• It is a major component of water

What was the purpose of the Biosphere II experiment?

• To measure the amount of carbon in the atmosphere

• To recycle nutrients within a closed system

• To observe the water cycle in a controlled environment

• To study the effects of light on plants

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Where is most of the water stored on our planet?

• In the atmosphere

• In glaciers

• In the ocean

• In rivers and lakes

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How do plants obtain carbon?

• Through respiration

• By absorbing it from the soil

• Through photosynthesis

• By consuming other plants

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What is the role of bacteria in the nitrogen cycle?

• They fix nitrogen into a usable form for plants

• They release nitrogen into the atmosphere

• They convert nitrogen into carbon

• They store nitrogen in rocks

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Where is phosphorus primarily stored in the environment?

• In rocks

• In the atmosphere

• In the ocean

• In plants

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