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right now, outside my window I see Lightning. It has been flashing for a while now, and there is a flash nearly every second. Does anyone know what this is?

**All of the following correctly describe the fate of the embryonic layers of a vertebrate EXCEPT: a..neural tube and epidermis develop from ectoderm b..linings of the digestive organs and lungs develop from endoderm c..notochord and kidneys develop from endoderm d..skeletal muscles and heart...