Reference no: EM132676681

1) What was the common ancestor of all chordates like? What allowed them to diversity into the highly successful phylum that they are now?

2) What are some ecological roles of tunicates and lancelets?

3) How does the lack of jaws differentiate agnathan fishes from gnathostome fishes in terms of their ecological roles?

4) What factors have allowed for the great diversification of jawed fishes, particularly actinopterygians?

5) What major anthropogenic pressures are fishes facing in the wild?

6) In what types of environments are amphibians generally restricted? Are there marine amphibians? Why?

7) Why have reptiles and their descendants become so successful at diversification and domination of most major ecosystems?

8) How do birds' key apomorphies help them fly?

9) Which mammalian apomorphies aid them in mastication? What is so important about mastication that several evolutionary modifications facilitate it?

10) Discuss the major anthropogenic pressures facing any of the tetrapod taxa in the wild.