Multiple Choice
By which process is carbon dioxide released from plants back to the atmosphere?
52. Ecosystems
Introduction to Ecosystems
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following is true of the nitrogen cycle?
A
Bacteria are not involved in the process.
B
Plants can take in and use atmospheric nitrogen through their leaves.
C
Some animals can use inorganic forms of nitrogen such as ammonium.
D
When plants and animals die, the nitrogen within their bodies becomes unavailable.
E
Nitrite is converted to nitrate (NO3–) by nitrifying bacteria.
Verified step by step guidance1
Understand the nitrogen cycle: The nitrogen cycle is a series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition.
Identify the role of bacteria: Bacteria play a crucial role in the nitrogen cycle, particularly in the conversion of nitrogen compounds. Nitrifying bacteria are responsible for converting nitrite (NO2–) to nitrate (NO3–).
Recognize the process of nitrification: Nitrification is a part of the nitrogen cycle where ammonia (NH3) is first oxidized to nitrite (NO2–) and then to nitrate (NO3–) by nitrifying bacteria.
Clarify the misconception about plant uptake: Plants cannot directly use atmospheric nitrogen (N2). They rely on nitrogen compounds like nitrate (NO3–) and ammonium (NH4–) that are made available through the nitrogen cycle.
Understand the fate of nitrogen in dead organisms: When plants and animals die, the nitrogen in their bodies is decomposed by bacteria and fungi, making it available again in the form of ammonium (NH4–) or other compounds, which can be further processed in the nitrogen cycle.
2:19mWatch next
Master Ecosystems, Energy, and Matter with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
