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Zorluk: OrtaEcology and Environment

Atmospheric nitrogen cannot be directly absorbed by most living organisms to synthesize essential proteins. In what sequential order does nitrogen travel from the air into animal body tissues?

  1. 1Specialized soil bacteria fix atmospheric nitrogen (N2N_2) into ammonium compounds (NH4+NH_4^+).
  2. 2Nitrifying bacteria oxidize ammonium into soil nitrates (NO3−NO_3^-).
  3. 3Plant roots absorb nitrates and assimilate them into organic amino acids and proteins.
  4. 4Herbivorous consumers ingest plant tissues and incorporate nitrogen into animal cellular structures.

Cevap

Specialized soil bacteria fix atmospheric nitrogen into ammonium compounds, nitrifying bacteria convert ammonium into nitrates, plant roots absorb nitrates and assimilate them into proteins, and herbivorous consumers ingest plant tissues to build animal cellular structures.
Atmospheric nitrogen must first undergo fixation by bacteria into ammonium, which is subsequently oxidized into nitrates by nitrifying bacteria. Vascular plants absorb these nitrates to assimilate amino acids and proteins. Finally, herbivores ingest the plant biomass, transferring nitrogen into consumer tissues.

Adım Adım Çözüm

1
Identify the initial chemical conversion required to make triple-bonded atmospheric nitrogen bioavailable.
Nitrogen-fixing bacteria convert atmospheric N2N_2 gas into ammonium ions (NH4+NH_4^+).
Plants and animals cannot directly metabolize diatomic nitrogen gas from the atmosphere.
2
Determine the soil transformation step that yields the primary form of nitrogen taken up by plants.
Nitrifying bacteria convert ammonium into nitrites and then nitrates (NO3−NO_3^-).
Nitrate is the most soluble and accessible inorganic nitrogen ion for terrestrial root uptake.
3
Trace the movement of inorganic nitrogen compounds from soil into biological producer biomass.
Plant roots absorb nitrates and assimilate them into amino acids and proteins.
Autotrophic synthesis builds the foundational organic molecules required by higher trophic tiers.
4
Trace the transfer of organic nitrogen from autotrophs into consumer bodies.
Herbivores consume plant biomass and digest it to construct animal proteins.
Heterotrophs rely strictly on ingesting organic matter to fulfill their nitrogen requirements.

Anahtar Kavram

Terrestrial Nitrogen Cycle and Trophic Assimilation Pathway
Tahmini Süre:1m 0s
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Konular

Ecology and Environment

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