FileTitleManuscript Id
Chapter 44 Introductionmorris2e_ch44_1.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_1_dlap.xml563c416f757a2e2541000000
44.1 A Tree of Life for More Than a Million Animal Species morris2e_ch44_2.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_2_dlap.xml563c416f757a2e2541000000
Phylogenetic trees propose an evolutionary history of animals. morris2e_ch44_3.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_3_dlap.xml563c416f757a2e2541000000
Morphology and development provide clues to animal phylogeny. morris2e_ch44_4.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_4_dlap.xml563c416f757a2e2541000000
Molecular sequence comparisons have confirmed some relationships and raised new questions. morris2e_ch44_5.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_5_dlap.xml563c416f757a2e2541000000
44.2 The Simplest Animals: Sponges, Cnidarians, Ctenophores, and Placozoans morris2e_ch44_6.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_6_dlap.xml563c416f757a2e2541000000
Sponges are simple and widespread in the oceans. morris2e_ch44_7.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_7_dlap.xml563c416f757a2e2541000000
Cnidarians are the architects of life’s largest constructions: coral reefs. morris2e_ch44_8.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_8_dlap.xml563c416f757a2e2541000000
Ctenophores and placozoans represent the extremes of body organization among animals that branch from early nodes. morris2e_ch44_9.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_9_dlap.xml563c416f757a2e2541000000
Branching relationships among early nodes on the animal tree remain uncertain. morris2e_ch44_10.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_10_dlap.xml563c416f757a2e2541000000
The discovery of new animals with a unique body plan complicates phylogenetic hypotheses still further. morris2e_ch44_11.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_11_dlap.xml563c416f757a2e2541000000
44.3 Bilaterian Animals morris2e_ch44_12.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_12_dlap.xml563c416f757a2e2541000000
Lophotrochozoans make up nearly half of all animal phyla, including the diverse and ecologically important annelids and mollusks. morris2e_ch44_13.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_13_dlap.xml563c416f757a2e2541000000
Ecdysozoans include nematodes, the most numerous animals, and arthropods, the most diverse. morris2e_ch44_14.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_14_dlap.xml563c416f757a2e2541000000
Deuterostomes include humans and other chordates, and also acorn worms and sea stars. morris2e_ch44_15.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_15_dlap.xml563c416f757a2e2541000000
Chordates include vertebrates, cephalochordates, and tunicates. morris2e_ch44_16.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_16_dlap.xml563c416f757a2e2541000000
44.4 Vertebrate Diversity morris2e_ch44_17.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_17_dlap.xml563c416f757a2e2541000000
Fish are the earliest-branching and most diverse vertebrate animals. morris2e_ch44_18.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_18_dlap.xml563c416f757a2e2541000000
The common ancestor of tetrapods had four limbs. morris2e_ch44_19.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_19_dlap.xml563c416f757a2e2541000000
Amniotes evolved terrestrial eggs. morris2e_ch44_20.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_20_dlap.xml563c416f757a2e2541000000
44.5 The Evolutionary History of Animals morris2e_ch44_21.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_21_dlap.xml563c416f757a2e2541000000
Fossils and phylogeny show that animal forms were initially simple but rapidly evolved complexity. morris2e_ch44_22.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_22_dlap.xml563c416f757a2e2541000000
The animal body plans we see today emerged during the Cambrian Period. morris2e_ch44_23.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_23_dlap.xml563c416f757a2e2541000000
Tabulations of described fossils show that animal diversity has been shaped by both radiation and mass extinction over the past 500 million years. morris2e_ch44_24.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_24_dlap.xml563c416f757a2e2541000000
Animals began to colonize the land 420 million years ago. morris2e_ch44_25.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_25_dlap.xml563c416f757a2e2541000000
Case 8: How have reefs changed through time? morris2e_ch44_26.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_26_dlap.xml563c416f757a2e2541000000
Chapter 44 Summarymorris2e_ch44_27.html563c416f757a2e2541000000
DLAP questionsmorris2e_ch44_27_dlap.xml563c416f757a2e2541000000