Evidence of EvolutionEvidence of Evolution

EvolutionEvolution

The process by which The process by which life has changed over life has changed over time.time.

MacroevolutionMacroevolution MicroevolutionMicroevolution

EvolutionEvolution

What are What are speciesspecies?? Species literally means ‘kinds’.Species literally means ‘kinds’. We recognize most species by their We recognize most species by their

appearance.appearance.

EvolutionEvolution

Taxonomy( systematics)Taxonomy( systematics) – branch – branch of biology that names and of biology that names and classifies speciesclassifies species

Carl LinnaeusCarl Linnaeus

Will cover Will cover more in more in Unit 16Unit 16

(1707–1778), a Swedish botanist, invented the modern system of binomial nomenclature.

EvolutionEvolution

ExampleExample

Panthera pardusPanthera pardus

PantheraPanthera parduspardus

PopulationPopulation

All the members of a All the members of a species living in a species living in a particular areaparticular area

new variations arise new variations arise these individuals tend these individuals tend

to surviveto survive This is where evolutionThis is where evolution

occurs ( not indivual) occurs ( not indivual)

AdaptationsAdaptations

Adaptations are special features Adaptations are special features that allow a plant or animal to live that allow a plant or animal to live in a particular place or habitat. in a particular place or habitat.

structures, physiology structures, physiology

AdaptationsAdaptations

ExplainExplain why life why life

is so is so diversediverse

EvolutionEvolution WhileWhile, evolution is , evolution is

an explanation for the an explanation for the unity of lifeunity of life. .

All organisms share the All organisms share the same characteristics of same characteristics of life because they can life because they can trace ancestry to the trace ancestry to the

first cell or cells.first cell or cells.

EvolutionEvolution Example:Example:

Humans and monkeys share a Humans and monkeys share a common ancestor common ancestor which separated into 2 separate lineageswhich separated into 2 separate lineages

40 million years ago40 million years ago

New world New world South America migration South America migration Old worldOld world

Today’s LabToday’s Lab

We will look at 2 We will look at 2 types of data that types of data that supports the supports the hypothesis of hypothesis of common ancestorscommon ancestors::

11) the fossil record) the fossil record

2) comparative anatomy2) comparative anatomy

Don’t forget….quiz next week Don’t forget….quiz next week over evolutionover evolution