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As far as is known, at its birth 4.6 billion years ago, our planet was an inhospitable pile of rocks accreted from cosmic debris, hot inside and cooling on the outside. Water and an atmosphere were present and crustal rocks began to form at once (the oldest being 4.3 billion years old).
Answer: does not have a nucleus
All of the four characteristics (has membrane-bounded organelles, has a nucleus, has a cell wall made of chitin and is at least 10 micrometers in diameter) are properties of eukaryotic cells. Cells that do not have a nucleus are prokaryotic cells.
true. theories can be modified