Exam 23: Systematics,phylogenies,and Comparative Biology

Evidence suggests that the crocodiles are more closely related to the birds than the turtles and snakes.If so,then including crocodiles,but not birds,in the Class Reptilia would make the Class Reptilia

-Based on the phylogeny shown,the group of species including (2-5)can best be described as a

-Consider the cladogram shown.Which pair of species shares the greatest number of derived characters (synapomorphies)?

-The table shows the distribution of traits (A-E)in six extant species (1-6).A "0" indicates the ancestral condition,while "1" indicates the derived condition.Based on this data,which species would be considered the outgroup?

Assume that the ancestor of this phylogeny had vascular tissue and chlorophyll.If this is true,which answer lists all key traits of a ginkgo?

The phylogenetic species concept (PSC)declares that a group is a species if it

A group is considered polyphyletic if