Cycles in Nature Review

Which is true of all organisms?

• they go through the process of cellular respiration

• they will break down nitrogen into ammonia and carbon

• they are all considered producers

• they all will produce a form of glucose in their cells

Most of the oxygen we breathe comes from:

• decaying wood and plants

• fungi and detritivores

• bacteria and fungi

• phytoplankton and algae blooms

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Part of the oxygen cycle, this process will provide plants with needed Carbon Dioxide.

• infiltration

• transpiration

• photosynthesis

• respiration

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Besides microscopic organisms, some of the oxygen we breathe comes from this process:

• subversion

• photosynthesis

• condensation

• transpiration

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Cellular respiration is important because:

• it produces an odor which is intended to attract prey

• it provides all organisms with needed energy

• it provides all organisms with their food supply

• it allows heterotrophs to defend themselves

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Besides glucose, cellular respiration needs this element to work:

• oxygen

• aluminum

• carbon

• nitrogen

Which of the following will convert atmospheric nitrogen into usable nitrogen and ammonia?

• scavengers

• consumers

• bacteria

• detritivores

Why do animals need nitrogen?

• this allows animals' brains and nervous systems to function properly

• to allow the heart to pump more freely

• to develop white blood cells to defend against infections

• to repair and strengthen muscular and skeletal tissue

Bacteria will change atmospheric nitrogen into:

• water then carbon dioxide

• carbon then oxygen

• ammonia then nitrates

• nitrates then carbon

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Both lightning and bacteria will convert atmospheric nitrogen into:

• ammonia

• water

• oxygen

• carbon