Ecology - Biodiversity & Conservation Questions

FIGURE 8: This cladogram shows the relationships among tetrapods, or four-limbed animals.
Tetrapoda Amniota Reptilia Diapsida Archosauria
clade clade clade clade
clade
amphibians mammals turtles/tortoises lizards/snakes crocodiles/alligators birds
feathers

Biology

Ecology - Biodiversity & Conservation Solutions

FIGURE 8: This cladogram shows the relationships among tetrapods, or four-limbed animals. Tetrapoda Amniota Reptilia Diapsida Archosauria clade clade clade clade clade amphibians mammals turtles/tortoises lizards/snakes crocodiles/alligators birds feathers and toothless beaks skull openings in front of the eye and in the jaw openings in the side of the skull Node In a cladogram, a node is the intersection of two branches This node represents the most recent common ancestor shared by the entire tetrapoda clade. skull opening Derived character behind the eyes Organisms that branch off after a hash mark share the derived character represented by the hash embryo protected o- by amniotic fluid mark. An embryo protected by amniotic fluid is a derived character shared by all organisms in the amniota clade. Amphibians do not have this derived character. four limbs with digits ANALYZE In this cladogram, what derived character is shared by organisms such as turtles and tortoises, but not by organisms such as mammals? Use the diagram to explain your answer. PREDICT Suppose scientists discover a new species that does not fit into any of the current kingdoms. How will scientists likely address this new discovery? a. Scientists will propose a new kingdom only after discovering more new species. O b. Scientists will modify all of the levels of taxonomy so they can fit the new species into the existing system. C. Scientists will either make minor changes to the criteria for one existing kingdom or propose a new kingdom. O d. Scientists will classify the new species into the kingdom that has the fewest number of species.

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