BIO 12D - Carbon and Nitrogen Cycle Retake

The diagram shows the flow of organic molecules through an ecosystem. One process that occurs in this ecosystem is labeled X, and another process that occurs is labeled Y. Which two processes are identified by the labels X and Y?

• X= Respiration and Y = Predation

• X = Adaptation and Y = Decomposition

• X = Fermentation and Y = Fixation

• X = Decomposition and Y = Respiration

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NGSS.MS-LS2-3

Some species of fungi, protists, and bacteria all play a vital role in every biogeochemical cycle. Which best identifies the function of these organisms?

• releasing oxygen into the atmosphere

• inhibiting the growth of other organisms in an ecosystem

• taking energy from the environment and producing organic molecules

• returning basic nutrients back to the ecosystem so that they can be used by other organisms

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NGSS.MS-LS2-3

Which cycle would be affected to the greatest extent by the destruction of the Earth’s huge rainforests?

• water cycle

• carbon cycle

• nitrogen cycle

• None of these is greatly affected.

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NGSS.MS-ESS2-4

In this simplified nitrogen cycle, which organism converts unusable nitrogen into a usable form?

• Organism 1

• Organism 2

• Organism 3

• Organism 4

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NGSS.MS-LS2-3

The conversion of nitrates into atmospheric nitrogen is facilitated by microbes in a process called –

• Decomposition

• nitrogen fixation

• denitrification

• nodulation

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

• nitrogen composition
• ammonia 
• nitrogen fixation
• denitrification

What happens when organisms die and decay? 

• Their bodies are lifted up
• Their nitrogen returns to the soil
• they keep their nitrogen
• They stay on earth forever

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NGSS.MS-LS2-3

Which of the following add carbon dioxide to the atmosphere?

• volcanoes
• combustion of fossil fuels
• animal and plant respiration
• all of these

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NGSS.HS-ESS2-6

NGSS.HS-LS1-7

NGSS.HS-LS2-5

How nitrogen is "fixed" into useable form for plants

• only through action of bacteria
• only through lightning
• through action of bacteria & lightning
• through photosynthesis

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NGSS.MS-LS2-3

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

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NGSS.MS-LS1-6