Critical Thinking Questions
16. How does a phylogenetic tree relate to the passing of time?
17. Some organisms that appear very closely related on a phylogenetic tree may not actually be closely related. Why is this?
18. List the different levels of the taxonomic classification system.
19. Dolphins and fish have similar body shapes. Is this feature more likely a homologous or analogous trait?
20. Why is it so important for scientists to distinguish between homologous and analogous characteristics before building phylogenetic trees?
21. Describe maximum parsimony.
22. Compare three different ways that eukaryotic cells may have evolved.
23. Describe how aphids acquired the ability to change color.