Many lines of evidence, including biochemical evidence, show that living birds are direct descendants of dinosaurs. A number of dinosaur lineages had feathered dinosaurs, not just the lineage that includes living birds. Do you think that is it justified to believe that all feathered dinosaurs had behaviors known from living birds? Such behaviors of birds include colonial nesting, sexual displays by males using feathers, males moving to display their ornamental feathers to female mates. Give a brief reason for your answer. FIGURE 17.24 Phylogenetic relation-ships and temporal duration (thick bars)of major groups of amniote vertebrates.Some authors define "reptiles" as oneof the two major lineages of amniotes,the other being the synapsids, whichincludes mammals. (After [53].)MammalsTherapsidsPelycosaursMesosaursProcolophonidsPareiasaursCaptorhinidsTurtlesProtorothyrididsCrocodiliansPterosaursDinosaurs (including birds)IchthyosaursRhynchocephalians (tuatara)Squamates (lizards and snakes)CPTrKPgNg3592992522011456623 PresentPaleozoicMesozoicCenozoicTime (Mya)JOrnithodiransLepidosaursArchosaursLepidosauromorphsArchosauromorphsParareptilesDiapsidsReptilesSynapsidsAmniotes

Birds are defined as the warm blooded animals that form the class Aves in Mammalia.

Answered: Many lines of evidence, including…

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter24: Systematics And Phylogenetics: Revealing The Tree Of Life

Section: Chapter Questions

Problem 1ITD: The phylogenetic tree for 12 cat species (Felidae) reproduced at right was assembled from molecular...

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Many lines of evidence, including biochemical evidence, show that living birds are direct descendants of dinosaurs. A number of dinosaur lineages had feathered dinosaurs, not just the lineage that includes living birds. Do you think that is it justified to believe that all feathered dinosaurs had behaviors known from living birds? Such behaviors of birds include colonial nesting, sexual displays by males using feathers, males moving to display their ornamental feathers to female mates. Give a brief reason for your answer.

FIGURE 17.24 Phylogenetic relation-
ships and temporal duration (thick bars)
of major groups of amniote vertebrates.
Some authors define "reptiles" as one
of the two major lineages of amniotes,
the other being the synapsids, which
includes mammals. (After [53].)
Mammals
Therapsids
Pelycosaurs
Mesosaurs
Procolophonids
Pareiasaurs
Captorhinids
Turtles
Protorothyridids
Crocodilians
Pterosaurs
Dinosaurs (including birds)
Ichthyosaurs
Rhynchocephalians (tuatara)
Squamates (lizards and snakes)
C
P
Tr
K
Pg
Ng
359
299
252
201
145
66
23 Present
Paleozoic
Mesozoic
Cenozoic
Time (Mya)
JOrnithodirans
Lepidosaurs
Archosaurs
Lepidosauromorphs
Archosauromorphs
Parareptiles
Diapsids
Reptiles
Synapsids
Amniotes

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