The embryo's development as seen here represents which processes in the development of any multicellular organism? a) meiosis followed by mitosis. b) mitosis and cell differentiation. c) meiosis and cell differentiation. eliminate d) protein synthesis followed by meiosis.

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?