SCILIVSY 12 Lecture 14: SLS12- Section (102516)
19 Jun 2018
School
Department
Course
Professor
Act$of$God?$-- all$ organisms$put$in$place$by$a$creator
§
Spontaneous$generations$of$organisms
○
If$we$all$have$common$ancestry,$how$did$they$end$up$how$they$are/where$
they're$found?
•
Climatological$and$physical$conditions$don't$explain$conditions$of$where$
they$are
○
Species$play$a$role$in$species$differentiation
○
SO,$GEOGRAPHY$RATHER$THAN$CLIMATE$EXPLAIN$CONDITIONS
§
Affinities$of$species$in$different$locations$are$independent$$of$local$
conditions
○
Darwin's$"three$great$facts"$about$the$distribution$of$species$(pg.$346)
•
Everything$explained$in$terms$of$migration
○
Wanted$the$explanation$that$requires$the$simplest$number$of$steps$
(simplest)
○
Darwin$worked$without$the$understanding$of$plate$tectonics
•
Chapter$12:
Distribution$of$organisms$on$islands$vs$on$mainland
•
Widespread$distribution$of$freshwater$species
•
Unique$species$most$likely$found$on$islands
•
Marine$birds$are$less$likely$to$form$a$separate$species
•
!"#$%&'()*+,-.,*/0
Tuesday,$ October$25,$2016
5:48$PM
