Biology, 09.12.2019 03:31 ramose7021
Stromatolites are rocky structures that generally form in shallow waters from the binding of sediment by microbial biofilms. stromatolites are typically hypothesized to be formed from the presence of cells that bind these grains together. if the appearance of the stromatolites in the fossil record were to indicate the emergence of life on earth, approximately how old are the oldest stromatolites on earth? a) 2.6 billion years old b) 3.6 billion years old c) 4.6 billion years old d) 400 million years old
Answers: 2
Biology, 22.06.2019 03:00
Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.
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Biology, 22.06.2019 04:30
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Biology, 22.06.2019 13:00
Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?
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Biology, 22.06.2019 13:00
Which type of landform forms at the plate boundary as a result of divergent stress
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Stromatolites are rocky structures that generally form in shallow waters from the binding of sedimen...
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