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11. All of these contribute directly to fertile topsoil except a. bedrock chemical reactions. b. minerals supplied by rock particles. c. decomposition action of fungi and bacteria. d. earthworms' breaking
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11. All of these contribute directly to fertile topsoil except

a. bedrock chemical reactions.
b. minerals supplied by rock particles.
c. decomposition action of fungi and bacteria.
d. earthworms' breaking down the soil.

User Nonso
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The answer is A. bedrock chemical reactions
User Russell Greene
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