765 areas in the united states
Answer:
Early cyanobacteria in stromatolites are thought to be responsible for increasing the amount of oxygen in the primeval Earth's atmosphere through their continuing photosynthesis. They were the first known organisms to photosynthesize and produce free oxygen.
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Answer:
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During meiosis, genetic recombination may occur more than once through the process of cell division, resulting in an increase in genetic variability.
Answer:
option c
Explanation:
Vascular plants transport water and nutrients using the vascular bundles, xylem and phloem. Xylem transports the former and phloem the latter