Three different rock layer sequences from three locations, each with different trilobite fossils, are shown here. Based on the relative positions of the fossils, which of the following conclusions is best supported by fossil evidence?

What must happen before a body cell can begin mitotic cell division

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Which samples do the atoms have the least kinetic energy