Jigsaw activity: How does mutation lead to Adaptation? What is Natural Selection? Give an example of Natural Selection. What is the Theory of Evolution? What evidences support Evolution?

Jig saw Activity: Adaptation, Natural Selection, and Evolution Questions Notes How does mutation lead to Adaptation? Give an example of Natural Selection. What is Natural Selection? What is the Theory of Evolution? What evidences support Evolution?

5. What evidences support Evolution? Jigsaw activity: On a piece of A3 paper, write a paragraph summary that answers your assigned question. Be ready to present your answers to your peers. How does mutation lead to Adaptation? 3. Give an example of Natural Selection. 5. What evidences support Evolution? 4. What is the Theory of Evolution? 2. What is Natural Selection?

1 GENETIC VARIATION leads to Adaptation

Fig. 22.11. Some spectacular adaptations.

Adaptation Adaptation is a long evolutionary process where a population becomes better suited to its habitat. Feature which is especially important for an organism's survival. Horse’s teeth Such adaptations are produced by the better suited forms reproducing more successfully, which is natural selection.

Adaptation is driven by Natural Selection 2 Adaptation is driven by Natural Selection

There are 2 variations of the beetles, green and red. The birds prefer eating the green beetles. Over generations the red beetles increase in population because they are not eaten by the birds. More survive to produce more offspring. Generations later…. Over time the red beetles have been selected over the green beetles

An Example of Natural Selection 3 An Example of Natural Selection

How did giraffe’s develop their long necks? Giraffe you tube video

Incorrect model of evolution Change through use and disuse

Natural Selection’s Explanation Ancestors had different neck lengths Through natural selection, longer necks survived and passed on their genes. Eventually all giraffes had long necks.

4 Theory of Evolution

Evolution Evolution is the change in the inherited traits (passed on from parents to offspring) of a population over many generations. These traits could be physical, chemical or behavioral. This change is caused by mutations in the genes.

Video Clip: http://www.youtube.com/watch?v=yVqJ_mQazik

How does Evolution Work? Natural Selection(survival of the fittest) is simply the logical result of four features of living systems: VARIATION Individuals in a population vary from one another (different genes caused by mutations) INHERITANCE parents pass on their traits to their offspring genetically SELECTION some variants reproduce more than others TIME successful variations accumulate over many generations

Evidences supporting Evolution 5 Evidences supporting Evolution

Similarities in Genetic Code

225 Million Years Ago the continents were together making a super continent called Pangaea When the continent began to split populations were separated.

This increased the variety of living things because they all had to adapt to different and new environments and habitats.

ONE A Common Ancestor

SIMILARITIES IN STRUCTURES