BI 101 - Phelan - Chap. 11 (Lecture) (1) - Chapter 11:...

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Chapter 11: AnimalDiversificationVisibility in motionLectures by Mark Manteuffel, St. Louis Community College
Learning GoalsDefine an animal and the keydistinctions that divide the species.Discuss evolutionary success.Define and describevertebrates andtheir evolution.Define and describe the terrestrialvertebrates, including amphibians,birds, and mammals.
Learning GoalsDescribe early human lifestyles andhuman evolution.Define and describe theinvertebrates, includingechinoderms, arthropods, molluscs,annelids, flatworms, cnidarians, andsponges.Are some animals smarter thanothers?
11.1 What is an animal?
11.2Four keydistinctions divide theanimals.
1) Does the animal havedefined tissues, withspecialized cells?
2) Does the animal developwith radial symmetry orbilateral symmetry?
3) During development, does theanimal’s gut develop fromfront to back or back to front?
4) Does growth occur by moltingor by adding continuously tothe skeletal elements?
11.3Everything that isnot extinct isevolutionarily successful.
What is “success”evolutionarily?ExtantorExtinct
11.4All vertebrates aremembers of the phylumChordata.
Fourdistinctfeatures ofchordates
The NotochordA rod of tissue extending from the headto the tailStiffens the body when muscles contractduring locomotionIn advanced chordatespresent only in early embryosreplaced by the vertebral column (backbone)
A Dorsal Hollow Nerve CordExtends from head to tail

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Term
Winter
Professor
VASSILIOS BARDIS
Tags
Biology, Evolution, gastropods, St Louis Community, Evolutionary Specialization

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