You are an astronaut on a peaceful, exploratory mission to Planet Q. As a representative from Earth, you are to present three gifts from our planet. What items will you take? Write a proposal to the sponsors of your mission explaining why you think these will make excellent tokens.

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

d. organisms have cells with different shapes and functions.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.