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

Question

Quizplus · Accepted Answer

Fossil evidence supports that both birds and crocodiles share the trait of laying eggs and building nests, which can be traced back to their common ancestors. This is a trait that has been observed in fossils of ancient reptiles, indicating its presence in the lineage leading to both modern birds and crocodiles.

A Phylogenetic Tree Shows That Birds and Crocodiles Share Many