A Phylogenetic Tree Shows That Birds and Crocodiles Share Many

question 17

Multiple Choice

A phylogenetic tree shows that birds and crocodiles share many features.A hypothesis based on this tree predicts that these features are present in a common ancestor.Which of these predicted traits is supported by fossil evidence?

• A)four-chambered heart
• B)singing for territory
• C)eggs and nests
• D)singing to attract mates

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