The extension questions center on a flowchart (dichotomous key) representing the six-kingdom model. Question 24: Possible Answers
Consider the old class "Reptilia" (turtles, snakes, lizards, crocodiles, but NOT birds). Using the concept of common ancestry, is "Reptilia" monophyletic, paraphyletic, or polyphyletic? Justify your answer. biological classification pogil answers extension questions
Only #3 ( Canis lupus ) is entirely correct. The extension questions center on a flowchart (dichotomous
, meaning it is static and does not change over time, providing a consistent global standard. Limitations of Appearance Justify your answer
The Linnaean system is an artificial classification based primarily on physical similarities (morphology). Its major limitation is that it does not always reflect common ancestry (phylogeny). Two organisms might look similar because they evolved independently in similar environments (convergent evolution), not because they share a recent common ancestor. Furthermore, the Linnaean ranks (e.g., "Family") are arbitrary and not standardized across different groups of organisms. For example, a "Family" in plants might contain vastly more genetic diversity than a "Family" in mammals.