Explain what must happen in order for an oxygen atom to become

Which of these best describes what occurs during cytokinesis? a) the chromosomes are separated b) the cell begins to divide by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Which event would lead to primary succession of a forest?