Exam 32: Deuterostome Animals

Using the clues given below, generate a phylogeny that shows the relationships among reptiles, prototherians, marsupials, and eutherians.Label the following characteristics (A-D) on the phylogeny: A.Ventral pouch B.Hair and mammary glands C.Amniote egg D.Highly developed placenta Clues: Prototherians, marsupials, and eutherians have hair and mammary glands. Marsupials have a ventral pouch and placenta. Eutherians have a placenta. Marsupials were once found on all continents but are now restricted to Australasia and the Americas. Reptiles, prototherians, marsupials, and eutherians are amniotes. Prototherians lay shelled eggs. Prototherians are only found in Australia and New Guinea.

Which fossilized organism provides support that birds evolved from a reptilian ancestor that possessed feathers?

Which statement about Neanderthals (Homo neanderthalensis) is false?

How do palaeognaths differ from neognaths?

Which features allow for heat retention in a vertebrate?

Phylogenetic analysis of gene sequences, combined with morphological comparisons, provide strong evidence for monophyly of deuterostomes.A common characteristic of the fossil yunnanozoans and modern chordates are _______, a character thought to be found in the common ancestor of deuterostomes.