EvolutionEvolutionArguments and Arguments and

Counter-argumentsCounter-arguments

Goals/ObjectivesGoals/Objectives

I will identify the arguments for evolution.I will identify the arguments for evolution. I will give examples of the arguments for I will give examples of the arguments for

evolution.evolution. I will counter arguments against evolution I will counter arguments against evolution

using scientific evidence.using scientific evidence.

What is an argument?What is an argument?

Argument vs. Argument vs. CouterargumentCouterargument

An argument isn’t just something that An argument isn’t just something that happens when two people disagree.happens when two people disagree.

In science, an argument is also the evidence In science, an argument is also the evidence for a theory or a scientific law.for a theory or a scientific law.

A counter-argument is evidence against an A counter-argument is evidence against an assertion, or statement.assertion, or statement.

Some of the Arguments Some of the Arguments for Evolutionfor Evolution

The Fossil RecordThe Fossil RecordNatural Selection and AdaptationNatural Selection and AdaptationCo-evolution/SymbiosisCo-evolution/SymbiosisHomologous StructuresHomologous StructuresIntermediate SpeciesIntermediate Species

The Fossil Record The Fossil Record Supports EvolutionSupports Evolution

Older fossils are found in older, Older fossils are found in older, deeper layers of Earth.deeper layers of Earth.

The fossils show changes in The fossils show changes in organisms over time. These organisms over time. These changes happened because of changes happened because of climate and other environmental climate and other environmental changes on Earth. changes on Earth.

Stages of Fossilization: Stages of Fossilization: DepositionDeposition

As people have dug into the Earth, they first find mammals (like humans, monkeys, and cats,) then lizards (like dinosaurs,) then fish, and then invertebrates (like worms)

Homologous Homologous StructuresStructures

Studying Homologous Studying Homologous StructuresStructures

http://www.simplescience.org/Lessons/http://www.simplescience.org/Lessons/Biology/AH/Lesson.phpBiology/AH/Lesson.php

http://www.sciencekids.co.nz/http://www.sciencekids.co.nz/gamesactivities/plantanimaldif.htmlgamesactivities/plantanimaldif.html

Easy species-sorting gameEasy species-sorting game

Why homologous Why homologous structures support structures support

evolutionevolution Organisms have similar structures because Organisms have similar structures because

they have a common ancestor.they have a common ancestor. The changes in structures, like hands, The changes in structures, like hands,

happen as organisms adapt to their happen as organisms adapt to their environment.environment.

Co-evolutionCo-evolution

Many organisms have coevolved adaptations that are mutually symbiotic.

For example, this hummingbird’s beak is specially shaped to feed on this flower.

The flowers pollen is only spread by hummingbirds.

Short Video Showing Short Video Showing PollinationPollination

Ted Talks: Pollination VideoTed Talks: Pollination Video http://www.ted.com/talks/http://www.ted.com/talks/

louie_schwartzberg_the_hidden_beauty_of_plouie_schwartzberg_the_hidden_beauty_of_pollination.htmlollination.html

Intermediate SpeciesIntermediate Species

Intermediate SpeciesIntermediate Species

Some of this archaeopteryx’s traits have more in common with reptiles and some have more in common with modern birds.

We call this animal an intermediate species or an evolutionary link.

Evolution of the Evolution of the DolphinDolphin

Fossils found in the Sahara Desert were first thought to belong to different animals.

Later, scientists found middle evolutionary stages that appear to link land mammals to the equatic mammals that evolved into dolphins.

This Animation Shows the Way This Animation Shows the Way that Mammals Evolved to Live that Mammals Evolved to Live

in the Oceanin the Ocean http://www.youtube.com/watch?http://www.youtube.com/watch?

v=8cn0kf8mhS4&feature=relatedv=8cn0kf8mhS4&feature=related

Review QuizReview Quiz

http://www.superteachertools.com/http://www.superteachertools.com/millionaire/online/game1384719961.phpmillionaire/online/game1384719961.php

Connections to HNHMConnections to HNHM

Scavenger HuntScavenger Hunt