Biology, 09.07.2019 06:30 stefaniethibodeaux
Which statement best describes the effect of the low density of frozen water in a lake? water in the lake freezes from the bottom up, killing all organisms. water removes thermal energy from surrounding land, causing the land to freeze. water freezing contracts the water and causes levels to decrease. water freezing on the top floats and provides insulation to the organisms living below.
Answers: 1
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The earth formed roughly 4.5 billion years ago, yet evidence of life dates back to about 3.5 billion years ago. which one is not a possible hypothesis of how life on earth arose?
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