Can someone help me please I don’t know how to do this and I have to hand it in ASAP!! :(

Why are current extinctions of concern to enviromentalists?

How are viruses different from eukaryotic cells?

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?