Question

categorize each agent of nitrogen fixation as either biotic or abiotic. press on an item in the answer box, and then press on the box under the corresponding category. to remove an item, you can press on the box and the trash can icon to the right of the item you want to remove. abiotic nitrogen fixers biotic nitrogen fixers add an answer item! add an answer item! answer bank nitrogen - fixing bacteria blue - green algae lightning pyrite forest fires lava flows

Explanation:

To solve this, we first recall the definitions: Biotic factors are living or once - living components, while abiotic factors are non - living components.

Step 1: Analyze each agent for abiotic nitrogen fixers

• Lightning: It is a non - living natural phenomenon that can fix nitrogen. So it belongs to abiotic nitrogen fixers.
• Pyrite: It is a non - living mineral and is an abiotic nitrogen fixer.
• Forest fires: These are non - living events (even though they occur in an ecosystem with living things, the fire itself is non - living) and are abiotic nitrogen fixers.
• Lava flows: Lava is a non - living geological material, so lava flows are abiotic nitrogen fixers.

Step 2: Analyze each agent for biotic nitrogen fixers

• Nitrogen - fixing bacteria: Bacteria are living organisms, so they are biotic nitrogen fixers.
• Blue - green algae: Algae are living organisms, so they are biotic nitrogen fixers.

Answer:

• Abiotic nitrogen fixers: lightning, pyrite, forest fires, lava flows
• Biotic nitrogen fixers: nitrogen - fixing bacteria, blue - green algae