1. Adaptations

2. What is Natural Selection?
Organisms w/favorable genetic variations for a certain environment will survive, reproduce, & pass these variations to offspring

3. Peppered Moth: an example of natural selection

4. Before Industrial Revolution
After Industrial Revolution

5. Before the Industrial Revolution, what color had the advantage
Before the Industrial Revolution, what color had the advantage? Which color would have a greater population?
After the Industrial Revolution, what color had the advantage? Which color would have a greater population?

6. Adaptation
Any trait that aids the chances of survival & reproduction of an organism
An individual can NOT adapt to environment!!
A species can adapt over time to environment
3 types

7. Adaptations
Adaptations through variations in a species allow some of a species to survive if the environment changes.

8. Types of Adaptations Structural Adaptations Physiological Adaptations
Behavioral Adaptations

9. 1. Structural Adaptations
Changes in the structure of organism’s body parts
Ex: thorns, spines, disruptive coloration (zebra/killer whale), camouflage, mimicry

10. Ex. Camouflage A species blends in with environment
Ex. Walking stick, leaf katydid

11. Coral king
Ex. Mimicry
One species “copies” another species – visual, smell, sound
Ex: King snake, owl butterfly, Viceroy butterfly
Viceroy monarch

12. 2.Physiological Adaptations
Changes in organism’s metabolic processes (Function of body parts)
Ex: drug resistance - bacteria, pesticide resistance - insects, poison glands

13. 3. Behavioral Adaptations
Changes in organism’s response to environment
Ex: spinning webs, danger signals, mating rituals, hibernation
Can be learned behaviors (taught) or instinctual (inherited)

14. Name the 3 types of adaptations and give an example of each
Talk to a Partner
Name the 3 types of adaptations and give an example of each

15. Try These!!

16. Be sure to use the term “natural selection”
Quick Write
Before the Industrial Revolution, what color had the advantage? Which color would have a greater population?
After the Industrial Revolution, what color had the advantage? Which color would have a greater population?
Be sure to use the term “natural selection”