QQuestionBiology
QuestionBiology
What is humus made of? (Select all that apply.)
A. earthworms
B. nutrients
C. bacteria
D. rocks
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Answer
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Step 1:I'll solve this problem step by step:
Step 2:: Understanding Humus Composition
Humus is a complex organic material formed in soil through the decomposition of plant and animal matter. Let's analyze each option carefully.
Step 3:: Examining Option A - Earthworms
Earthworms contribute to humus formation but are not a direct component of humus itself. They help break down organic matter, so this is partially correct.
Step 4:: Examining Option B - Nutrients
Nutrients are present in humus and are a result of decomposition, but they are not the primary structural component of humus.
Step 5:: Examining Option C - Bacteria
Bacteria are critical in the decomposition process that creates humus. They actively break down organic matter and are integral to humus formation.
Step 6:: Examining Option D - Rocks
Rocks are inorganic and not a component of humus, which is an organic material.
Final Answer
The correct answers are: - C. Bacteria - B. Nutrients Explanation: Bacteria are essential in decomposing organic matter to create humus, and nutrients are a key characteristic of humus. Earthworms aid the process but are not a direct component, and rocks are not involved in humus formation.
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