Multiple Choice
Which of the following organisms primarily feed on phytoplankton?
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48. Ecology
Introduction to Ecology
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What chemical process is most likely to occur if large clumps of grass clippings are left on a lawn?
A
Anaerobic decomposition leading to the production of methane (CH_4)
B
Photosynthesis increasing oxygen levels in the soil
C
Nitrification converting ammonia to nitrate
D
Denitrification increasing soil nitrogen content
Verified step by step guidance1
Step 1: Understand the scenario described in the problem. Large clumps of grass clippings left on a lawn create an environment where oxygen is limited due to the dense packing of organic material. This is key to identifying the chemical process involved.
Step 2: Recall the concept of anaerobic decomposition. In environments with limited oxygen, microorganisms break down organic matter anaerobically, producing byproducts such as methane (CH₄). This process is distinct from aerobic decomposition, which requires oxygen.
Step 3: Evaluate the other options provided in the problem. Photosynthesis is unlikely because grass clippings are no longer living and cannot perform photosynthesis. Nitrification and denitrification are soil processes involving nitrogen compounds, but they require specific conditions not described in this scenario.
Step 4: Connect the anaerobic decomposition process to the production of methane (CH₄). Methane is a common byproduct of anaerobic decomposition, especially in environments with dense organic material and limited oxygen.
Step 5: Conclude that anaerobic decomposition leading to methane production is the most likely chemical process to occur under the conditions described in the problem.
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