Nitrogen Cycle

Front

Roughly how much of the atmosphere is composed of nitrogen gas? Options: 87%, 38%, 78%, 21%

Back

78%

Front

How do plants get the nitrogen they need?

Back

from the soil or water in which they live

Front

The swelling on the roots of a soybean are called

Back

Nodules

Front

Role of nitrogen-fixing bacteria in the nitrogen cycle?

Back

Nitrogen gas into ammonium ions

Front

How do animals obtain the nitrogen they need?

Back

plants and/or animals they eat

Front

Organisms require nitrogen to make which of the following? glucose and starch, lipids and nucleic acids, proteins and nucleic acids, carbohydrates and proteins

Back

proteins and nucleic acids

Front

Nitrogen fixation involves nitrogen from which of the following sources? lightning, fertilizers, dead plants, atmosphere

Back

atmosphere

Front

Which group of bacteria convert ammonium ions to Nitrite and Nitrate ions? Options: Denitrifying, Nitrifying, Nitrogen-fixing

Back

Nitrifying

Front

Which group of bacteria convert nitrogen gas into ammonium ions?

Back

Nitrogen-fixing

Front

Which group of bacteria require aerobic conditions in order to oxidise nitrites to nitrates?

Back

Nitrifying