Most of the organisms with which we are familiar, including humans, started with a sperm and an egg. One such organism, the sea urchin, has sperm and eggs remarkably similar to our own. Ask and answer questions while introducing the model to insure active participation and check understanding. Students study eggs and sperm under their microscopes, using the gametes collected by the teacher. Students will make careful drawings of their observations.
Students write up their lab reports and answer implication questions .