If the same base pairs are used to code for all organisms why is there so much variation among organisms

The table above shows five different types of chromosomal abnormalities that can occur during meiosis. they result in either an individual having too many or too few chromosomes in their genome. what is the most likely cause of these chromosomal abnormalities?

Which fossil organism in whale evolution do you think was the first to live mostly in water? explain your claim with evidence and reasoning?

Name the tissue that in translocation