{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}


SCI_240_Feb_21[1] -  ­ Cladis'cs and Specia'on ...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview:  ­ Cladis'cs and Specia'on  ­ Origin of Life Feb 21st Announcements •  Thanks for your input! •  E ­mail addresses and iLearn access •  Exam review date and @mes: Friday, February 25th at 9AM ­11AM and 3:30PM ­6PM in this classroom *Come prepared with ques2ons!* •  Delete Study Guide #s 19 ­4, 20 ­22; Life form matching (a. and 4); [email protected] choice 4. Edit fill ­in ­the ­blank #2 (5 [email protected] barriers). Will edit. •  Extended office hours today: 1:30PM ­ 3:00PM •  Feel free to e ­mail [email protected] during the week •  Next week’s class: aZend!! Reflec'ons Today Top 4 Ques'ons in Reflec'ons •  “morphies”: Pleiso ­, Anapo ­, Synapo ­, Symplesio ­, •  Species Defi[email protected] •  Sympatric vs. Allopatric [email protected] •  Autopolyploidy and Allopolyploidy Ac'vity Origin of Life •  Apomorphy= derived character •  Plesiomorphy= ancestral character •  Homology is similarity of traits in two or more species due to descent from a common ancestor. •  Synapomorphy (a shared derived character) is homology based on recent shared ancestry •  Symplesiomorphy (a shared [email protected] character) is homology based on more distant ancestry •  pg.543 explains the above terms well •  Autapomorphy is a derived trait that is unique to a given terminal group. •  Homoplasy is similarity NOT due to homology but [email protected] from convergent [email protected] Wikipedia.com Mono ­,Para ­, Polyphyle'c Monophyle'c describes a taxon which includes an ancestral species and all of its descendent species. And is defined by a suite of shared ­derived characters (synapomorphies). [email protected] groups are [email protected] called clades. Ideally, all taxa should be [email protected] Paraphyle'c describes a taxon which includes an ancestral species and some but not all of its descendents. [email protected], a [email protected] group is defined by a suite of ancestral traits (plesiomorphies) which have been modified or lost in the excluded species. Polyphyle'c describes a taxon which includes species whose common ancestor is not included within the group. [email protected], a [email protected] group is defined by convergent traits (homoplasies). Species Defini'ons •  The Morphological Species concept emphasizes overall similarity –  Characterized by [email protected] [email protected] of morphological, anatomical and physiological features •  The Biological Species concept emphasizes [email protected] [email protected] –  Characterized by a [email protected] whose members have the [email protected] to interbreed in nature to produce viable, [email protected] offspring •  The Evolu'onary Species concept emphasizes [email protected] relatedness –  Those individuals that share a recent common ancestor belong to the same species Sympatric vs. Allopatric Specia'on •  “sym ­” with, together •  “allo ­”= other •  “patric”= [email protected] land •  allopatric specia'on ­ new species form when geographically isolated [email protected] evolve [email protected] barriers as a byproduct of [email protected] dric and natural [email protected] to its new environment •  sympatric specia'on ­ [email protected] occurs in geographically overlapping [email protected] due various pre ­ and post ­[email protected] barriers Pre ­ and Post ­ Zygo'c Barriers Autopolyploidy and Allopolyploidy Read PAGES 495 ­496 Today’s ac'vity Crea'ng a concept map also known as who was influenced by the works of developed the principle of who wrote about Uniformitarianism Population Limits which made Darwin infer that which made Darwin see that there was a and witnessed firsthand when an Earthquake struck the Chilean coast these are examples of which are characteristics that enhance survival and reproduction in specific environments !"#$%&"'()*+,'-.*/*012*)3&)42*+56*)789&&%85&:*/;<*3=2*32&$%49%+/'' Steps to crea'ng your concept map 1.  2.  3.  4.  The main idea will be given Important terms will be given Write each term on a separate post ­it Organize the terms (on the white board) into a map that indicates how the terms are associated 5.  Draw arrows between the terms and add [email protected] phrases or [email protected] to the arrows that indicate how the terms are related. Use the following words to construct a concept map whose topic is the ORIGIN OF LIFE Reducing Environment Inorganic precursors Organic compounds Self ­[email protected] Organic polymers [email protected] synthesis Protobionts Proteinoid Energy Sources Hydrolysis Internal Environment UV [email protected]/ Lightning Hereditary System Membrane [email protected] First Prokaryotes Ribozymes RNA World H2/CO2/CH4/NH3/H2O [email protected] and Voltage [email protected] Liposomes Amino Acids Chemoheterotroph Origin of Eukaryotes Cell membrane Size Prokaryotes Mitochondria Chloroplasts Organelles Eukaryotes [email protected] rRNA sequences Bacterial enzymes Binary Fision Circular DNA Histones •  •  •  •  •  •  •  •  •  •  •  •  Autogenesis Plasma Membrane Specialized Structures Symbiosis Endosymbiosis [email protected] [email protected] In ­foldings Nucleous Autotroph Heterotroph Ribosomes Inner membrane transport system Reflec'on #3 Name, sec'on and date Out of all the material you have learned so far in BIOL 240 this semester, what concept(s) remain unclear? Remember, you’ll be graded on your effort to express yourself! ...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online