Use the diagram to identify the four regions of the earthworm. Dorsal side:_
Ventral side:_
Anterior end:_
Posterior end:_

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.

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.