Skull Comparison Lab Report

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Skull Comparison Lab Report We were recently assigned the task of examining, note taking, comparing, and contrasting three different types of skulls. All three had the same basic makeup, but each had its own special features similar to us. The theory that all of us are different in some certain way by form of variation; which set the one apart from the others and made it obviously a different type of organism or species. We had been told to determine which two groups of skulls were most closely related after a series of experiments. We came to the hypothesis, after discussing, that groups two and three would be the closest species out of the three because by simply glancing at the three groups, the physical features were very much alike in the two skulls we chose than in the other. Then after even taking a closer look at them from up close, we found even more evidence that backed up our hypothesis, but didn't prove it yet. The materials we used to support our hypothesis are as follows: Skulls 1B, 2A, and 3B. A measuring tape for quantitative observations Liquids for putting the skull in when measuring volume A graduated container for measuring the liquid obtained while measuring volume Pen and paper for taking observations. Our procedure was to use the measuring tape to measure the circumference of the eye sockets; the span across the front of the teeth, left to right molar; the bottom of the brow ridge to the bottom of the cranium; the length of the nose; and the span between the top of the jaw to the beginning of the skull's teeth. We then measured the volume of each brain by filling the cranium with water and pouring the water into a graduated cylinder, measure the water and record it. When we were done with all of these experiments, we would record the results and figure the differences between each. We would find the differences by subtracting the results of 1B, from the results of 2A, the results of 1B to the results of 3B. The results of 2A from 3B and 1B, and the results of 3B from 2A and 1B. These figures would tell us the differences between the quantitative results and also give us a more accurate evaluation of this lab. Besides these quantitative observations we also took notes on the physical appearance and these observations, which gave us our hypothesis also pointed to the conclusion that two and three were most closely related mostly because of the shape of the cranium and the brow ridge difference. 1B 2A 3B Circumference of Eye: 11cm 11cm 11cm Molar to molar: 17.5cm 17cm 18cm Bottom of brow-Bottom of Skull: 39cm 32.5cm 19cm Top of jaw-beginning of tooth: 12cm 16cm 16cm Length of nose: 3cm 3cm 4cm Volume of brain: ??? ??? 340mL The differences between the three types of skulls are very balanced, but we still believe that skulls two and three are the most closely related, if not for the quantitative results, for the observations made by common sense and physical observations. Since I am not trained (yet) how to determine exactly what the species is, but with the technology today, a trained scientist in the field of biology could easily tell us which were closely related and which weren't. We ran out of time before we could record the volume, but if I could predict what the volume was, I would say that skull

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