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Making rough estimate of physical quantities is useful because it allow us to have an idea of how big or small a quantity is, it gives us the near result of the real quantity a matter contains. The approximate quantity obtained will give us information about the size of the quantity.
3rd and 4th awnsers are correct
The cell would have 2 nuclei but the cytoplasm wouldn't be able to split.
Answer:
Bacteria that entered an organism body can cause mutations by altering the gene