CCE9 Nitrogen & Phosphorus Cycles: Always Recycle! Part 2 - CC9

What percentage of the atmosphere is made up of nitrogen gas?

• 50%

• 78%

• 21%

• 1%

Which enzyme is the only biological enzyme that can break the triple bond of nitrogen gas?

• Lipase

• Protease

• Amylase

• Nitrogenase

What family of plants do most nitrogen-fixing bacteria form symbiotic relationships with?

• Ferns

• Grasses

• Legumes

• Mosses

What is the main form of nitrogen that plants can assimilate?

• Nitrates

• Nitrogen gas

• Ammonia

• Nitrites

Tags

NGSS.MS-LS2-1

What is the role of denitrifying bacteria in the nitrogen cycle?

• Assimilate nitrogen into plants

• Convert ammonia into nitrates

• Fix nitrogen gas into ammonia

• Convert nitrogen oxides back into nitrogen gas

Which element does not involve the atmosphere in its cycle?

• Phosphorus

• Carbon

• Nitrogen

• Oxygen

What is the term for bacteria that can break down rocks to release phosphates?

• Denitrifying bacteria

• Nitrifying bacteria

• Lithotrophs

• Decomposers

What is the main source of phosphorus in the lithosphere?

• Sedimentary rocks

• Metamorphic rocks

• Volcanic rocks

• Igneous rocks

What is the main ingredient in synthetic fertilizers?

• Calcium and magnesium

• Hydrogen and sulfur

• Carbon and oxygen

• Nitrogen and phosphorus

What is the P in ATP?

• Peptide

• Protein

• Potassium

• Phosphorus

Tags

NGSS.HS-LS2-3