IB Biology Definitions: Topic 5 Evolution & biodiversity Revision Sheet Evolution is changeovertime _____________________________________________________________________________ Artificial selection is ______________________________________ madebynomansforbreeding atplantsandanimals aimed _______________________________________________________ The evidence from the fossil record shows that Natural selection is thatand it b etter _______________________________________________________ evolution increasesc haracteristics m akese asier to survive _______________________________________________________ individuals m areitmoreaner b eneficial that traits with Adaptations are Divergent evolution in Finches tothe _____________________________________________________________________________ evolution fromorganismsfrom compared present thepast Homologous structures provide evidence that redbutthere iscommon goes _____________________________________________________________________________ How does divergent evolution occur? ___________________________ different groupsseparate and ___________________________ divided geographicbarrier ___________________________ ___________________________ Selective Breeding is evidence that Pentadactyl limbs of a dolphin & monkey Compare the pentadactyl limbs in the diagram on the right ___________________________________________________________ dolphin monkey a) Steps are: VARIATION, OVERPOPULATION, STRUGGLE for SURVIVAL, NATURAL SELECTION ions femur one Explain selection pressure. that _____________________________________ environmental factors reduce _____________________________________ success population andwineventually _____________________________________ contribute theextinction _____________________________________ give to femur anterentiengntisimbois sameienantangers macaptertoswim amadaptedforwaning _____________________________________ ____________________________________ Classification taxa = K___________, P____________, C__________, O__________, F___________, G__________, s____________ Features of plants (all groups required) Phylum Bryophyta Plant phyla: _________________, _________________, _________________, _________________, angospermopnyta coneeropnsta bryophyte ananonnyta Filicinophyta Animal phyla: _______________, _______________, _______________, annenda _______________, _______________, _______________, arthropada platyhelminth cnidaria portera mosca ution Coniferophyta Animal groups in the Chordata phylum: _B_____________ _M______________ _A_____________ _R____________ _F___________ was ammais The three domains of living things are: ______________________ bacteria A cladogram minions entries isnes _______________________ _______________________ archaea Analysis of evolutionary relationships using a cladogram Using the cladogram on the left identify the closest relative of the crocodiles ______________________________________ birds Suggest whether the last common ancestor of primates and crocs had four limbs ______________________________________ megadnavenumbs Explain how the diagram shows the approximate date of the last common ancestor of two species _______________________________________________________ ____________________________________________________________________ eukarya Classification groups in a cladogram Angiospermophyta waystems Evidence from cladistics (DNA analysis in particular) has caused reclassification of some groups. Explain why. _________ _________________________________ technologya dvancesthere y was ableto _________________________________ create cladogramwhich _________________________________ snowed theprobableevolutionary _________________________________ relationshipbetween species.tn's thenused cladogramwas evaluateandclassifythese groupsmoreaccurately re © David Faure, InThinking http://www.thinkib.net/biology Main features to
