What evidence of life on Earth before stromatolites do we have? What will be an ideal response?
In Greenland, 3.8 billion-year-old rocks contain small carbon spheres that may be organic in origin,
but evidence is not conclusive. Archean and Early Paleoproterozoic rocks contain fossils of singlecelled
bacteria that lack a cell nucleus and reproduced asexually, called prokaryotic cells
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Which of the following best matches the description?Level area constructed on steep slopes for agricultural purposes.
A. humus B. windbreak C. leaching D. soil profile E. weathering F. horizon G. terrace H. friable I. parent material J. contour farming K. soil texture L. soil structure M. lithosphere N. chemical weathering O. mechanical weathering P. asthenosphere Q. loam
What would happen if you used data from a very dry set of years to compute the recurrence interval calculations?
What will be an ideal response?
Phosphorous is released from rocks by which process?
A. weathering and erosion B. photosynthesis C. bacterial decomposition D. All of these are correct.
Fossil fuels are distributed fairly evenly around the globe.
Answer the following statement true (T) or false (F)