GorillaGrodd

a. Briefly describe (not just identify) the two different species that possess the homologus trait. (5 pts) Per the name of my blog I obviously have to go with Gorillas and subsequently humans. Specifically, we both five phalanges that are a direct result of a common ancestor. We also both have opposing thumbs and walk upright, again both as a result of our common ancestor. b. Describe the homologus trait of each species, focusing on the differences in structure and function of the trait. Why do these homologus traits exhibit differences between the two species? Make sure your explanation is clear and complete. (10 pts) Gorillas have denser bone structure and larger extremities in their hands and feet. This is because gorillas use their hands and feet to climb and their extremities must be able to support their larger frame and withstand the pressure and force they are asked to endure. Also they do not walk as upright as humans because they also use their hands for walking. c

Briefly (but completely) describe the contribution this individual made to the scientific community. You must provide one link to an online source of information besides your textbook. No Wikipedia sources! ( 10 pts)   Charles Lyell was the pioneer of uniformitarianism. This was important because it suggested that the earth formed in a uniformed manner over time. He was determined to make geology a science of its own using observation and not supernatural theories.   http://evolution.berkeley.edu/evolibrary/article/history_12   3. From the bullet point list above (under “How does evolution work?”), identify the point (or points) most directly affected by this individual’s work and thoroughly explain how this point was influenced by your selected individual. Again, this could be a positive effect, meaning Darwin built upon the knowledge this information provided, or a negative effect, meaning that Darwin demonstrated that this individual’s idea(s) were incorrect a