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Unformatted text preview: Control: There were 17 cells, 5 of which were on the outer membrane and were in shapes of noodles or semi-circles. Experimental: There were 13 cells, the insides of the cells were covered in faint green blemishes, which were no longer semi-circules, but full circles, and in motion. The cells showed signs of being mutated most were pink, but not all: the rest were a vague shade of brown with thick membranes surrounding them. Friday, November 20 th 1:00 pm Control (dissecting) most cells were in the pluteus stage and few in their late prism stage. 15 (pluteus) : 7 (late prism) ratio Experimental (dissecting) Most cells also in pluteus and late prism stage 8 (pluteus) : 4 (late prism) Embryos seem to be developing at a more normal rate than before. . *does retinoic acid cause permanent prematurity or simply a delay in embryonic development of sea urchins?...
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- Fall '10