Question $2$: Unity$/$Diversity & Structure$/$Function $(14)$ Thinking about animals on Earth and the unity and diversity of structures and functions across these organisms, consider the following questions. In your response, you must organize your response into the different parts: A$,$ B$,$ and C$.$ Part A$.$ Briefly describe TWO specific functions that are shared by many organisms $($i$.$e$.,$ digestion, gas exchange, many to choose from!$)($Note for clarification: In part A$,$ choose the two different functions and describe what the function is and why it is a function shared by many organisms$).$ Part B$.$ Now, discuss specific examples of how TWO different organisms accomplish each function listed in A using different structures. Make sure that you link together how the structures you discuss relate to the function. $($Note for clarification: If you had Function X and Function Y that you described in Part A above, in Part B you should choose an example $($each example should compare two different organisms$)$ for each X and Y and describe how two different organisms achieve that function using different structures$).$ Part C$.$ Drawing upon knowledge from lectures on mechanisms that drive evolutionary change and speciation, propose an explanation for the unity and diversity that exists across structures$/$functions both of the examples you used in Part B$.$ In other words, come up with a plausible explanation on how the diversity in structures may have evolved.