Historically, whales and hippos have been classified in different orders: Cetacea and Artiodactyla, respectively. Recent molecular evidence, however, indicates that whales' closest living relatives are hippos. This has caused some zoologists to lump the two orders together into a single clade, the Cetartiodactyla. However, it remains unclear whether the whale lineage diverged from the hippo lineage before or after other members of Order Artiodactyla diverged. The cladograms below show these two possibilities. Considering only whales and hippos, which cladogram shows these two groups positioned in the same clade? "Within" Phylogenetic Tree "Without" Phylogenetic Tree Whales Whales Hippos Hippos Other Pigs artiodactyls Other Pigs artiodactyls O The "without" phylogenetic tree O The "within" phylogenetic tree

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Historically, whales and hippos have been classified in different orders: Cetacea and Artiodactyla,
respectively. Recent molecular evidence, however, indicates that whales' closest living relatives are
hippos. This has caused some zoologists to lump the two orders together into a single clade, the
Cetartiodactyla. However, it remains unclear whether the whale lineage diverged from the hippo
lineage before or after other members of Order Artiodactyla diverged. The cladograms below show
these two possibilities.
Considering only whales and hippos, which cladogram shows these two groups positioned in the
same clade?
"Within" Phylogenetic Tree
"Without" Phylogenetic Tree
Whales
Whales
Hippos
Hippos
Other
Pigs
artiodactyls
Other
Pigs
artiodactyls
O The "without" phylogenetic tree
O The "within" phylogenetic tree
Transcribed Image Text:Historically, whales and hippos have been classified in different orders: Cetacea and Artiodactyla, respectively. Recent molecular evidence, however, indicates that whales' closest living relatives are hippos. This has caused some zoologists to lump the two orders together into a single clade, the Cetartiodactyla. However, it remains unclear whether the whale lineage diverged from the hippo lineage before or after other members of Order Artiodactyla diverged. The cladograms below show these two possibilities. Considering only whales and hippos, which cladogram shows these two groups positioned in the same clade? "Within" Phylogenetic Tree "Without" Phylogenetic Tree Whales Whales Hippos Hippos Other Pigs artiodactyls Other Pigs artiodactyls O The "without" phylogenetic tree O The "within" phylogenetic tree
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