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Most large-scale coal mining in the western United States uses which extraction method? A.surface strip mining B.deep shaft mining C.longwall mining D.drift mining
Weegy: Most large-scale coal mining in the western United States uses which extraction method? A.surface strip mining (More)
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Asked 7/9/2013 6:36:30 AM
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Which of these is a metamorphic rock? A. gneiss B. granite C. sandstone
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Updated 236 days ago|1/27/2014 11:47:12 AM
1 Answer/Comment
A. Gneiss is a metamorphic rock.

Added 236 days ago|1/27/2014 11:47:11 AM
What may cause igneous or sedimentary rock to be transformed into metamorphic rock? A. the accumulation of deposits through erosion B. the thinning of the crust at a spreading zone C. long periods of intense heat and pressure D. a fracture at a fault or subduction zone
Weegy: Long periods of intense heat and pressure may cause igneous or sedimentary rock to be transformed into metamorphic rock. (More)
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Expert Answered
Updated 5 days ago|9/15/2014 4:39:40 PM
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How can a plasmid be described? A. a small organelle B. a small loop of DNA C. a prokaryotic ribosome D. a prokaryotic membrane
Weegy: A plasmid can be described as a small loop of DNA. User: How long ago are prokaryotes believed to have evolved on Earth? A. 3.5 million years B. 1.5 billion years C. 2 billion years D. 3.5 billion years Weegy: Prokaryotes are believed to have evolved on Earth 3.5 billion years ago. User: What instrument was essential to the development of the cell theory? A. the camera B. the test tube C. the x-ray machine D. the light microscope Weegy: It was the camera. (More)
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Updated 5 days ago|9/15/2014 4:38:20 PM
1 Answer/Comment
The light microscope is the instrument which was essential to the development of the cell theory.
Added 5 days ago|9/15/2014 4:38:20 PM
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