Complete activity one.







Prepare an essay by outlining gastrulation in an amphibian model.







Next outline the events in a fish mammal.







Compare the two by listing at least 4 mechanism that they share, and then 4 contrasting characteristic. Include variables such as why and how each is an appropriate model.





Keep the following guiding questions in mind as you complete this activity taking care to ensure your response address them:

•What is distinct and unique about this stage?

•How much of the organism is finished at this stage?

•Could you really distinguish the gastrula of a mammal from one of a bird?



Complete the assigned readings (Activity One).











Prepare an essay of about 200 words addressing the following: Among mammals more similar to birds, fish, or amphibians in terms of gastrulation?







Notice that you are not expected to find an answer. There is not a single correct answer. You need to use the question as a prompt to demonstrate your understanding of the material.







Make sure all your points are supported with citations and explain your reasoning.







You should not need or use any references other than the class materials.







Make sure to write in your own words as much as possible, using quotation marks and internal citations if you must cite the text directly. Always include page numbers if you cite the text.