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Unformatted text preview: 3/2/08 Lab 6: Development and Fungal Reproduction Lab PURPOSE : The purpose of the first lab is to observe the beginning stages of development in a sea urchin and chick embryo, as well as the key developing structures and the process of neurulation. The second lab involves the observation of sexual reproduction of a fungus, and the nonreproductive fungal hyphae. ABSTRACT : The first experiment in this lab involves the fertilization of sea urchin embryos. Students obtained previously made vials of sperm and unfertilized eggs, and placed a small amount of each onto a depression slide. They then observed the initial stages of reproduction underneath a compound microscope. Students then observed the effects of hypertonic and hypotonic solutions on the excess sea urchin eggs by surrounding some in 2X sea water (hypertonic saline) and then 0.5X sea water (hypotonic saline). The next part of this experiment involved the students 0....
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