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Multiple Choice
What supplies the energy for most of the microorganisms in the rhizosphere?
A
Nitrogen-fixing bacteria
B
Mycorrhizae
C
Earthworms
D
Soil bacteria
E
Plants
Verified step by step guidance
1
Understand the rhizosphere: The rhizosphere is the region of soil that is directly influenced by root secretions and associated soil microorganisms. It is a dynamic environment where plants and microorganisms interact closely.
Identify the role of plants: Plants play a crucial role in the rhizosphere by providing organic compounds through root exudates. These exudates include sugars, amino acids, and other organic molecules that serve as nutrients for microorganisms.
Recognize the energy source: The energy for most microorganisms in the rhizosphere comes from the organic compounds released by plant roots. These compounds are metabolized by microorganisms, providing them with the energy needed for growth and reproduction.
Consider the role of microorganisms: While nitrogen-fixing bacteria, mycorrhizae, and soil bacteria are important for nutrient cycling and plant health, they rely on the organic compounds from plants as their primary energy source.
Conclude the relationship: The symbiotic relationship between plants and microorganisms in the rhizosphere is essential for nutrient exchange and energy flow, with plants supplying the necessary energy through their root exudates.