1. Natural Selection vs. Selective Breeding
Environmental and Human Influences

2. Natural Selection vs. Selective Breeding
Process by which organisms that are most suited to their environment survive and reproduce most successfully.
Method of breeding where humans allows only those organisms with desired characteristics to produce the next generation.
Natural Selection vs. Selective Breeding

3. Guiding Concepts of Natural Selection
More offspring are born than will survive and reproduce
Organisms that are better suited for their environment are more likely to survive and pass on their better adapted traits.
Mutations are a source of variation and appear randomly

4. MUTATIONS?? What? Who’s the mutant?
Mutations are normal and typically insignificant 

5. Natural Selection Mouth parts - ex: beaks, teeth External color -
Summary: Organisms with successful traits survive and get to pass their traits on to offspring.
Mouth parts -
ex: beaks, teeth
External color -
ex: fur, scales, feathers
Behavior -
ex: migration, hibernation

6. Galapagos Islands
1850’s: Charles Darwin described how organisms might change over time.
Theory of Evolution
5 years of observations on the islands.

7. Galapagos Finches

8. So…
Variations within a population (one species) result in minor differences between offspring. Over the course of many generations, the minor variations that are helpful to a species’ survival get selected over and over and over again, becoming more pronounced. Like, an even longer neck…or even sharper claws.
Those changes in traits that help survival of the SPECIES are called adaptations.
Again, they can be internal, structural, or behavioral.

9. Discuss with shoulder partners the variations within the following populations.

13. Selective breeding Domestic Animals Plants:
Summary: Human selection of characteristics and behavior.
Domestic Animals
Ex: Chickens, Dogs, Cows
Plants:
Ex: Corn, Brasilica, Fruit hybrids

14. Domestic Animals
Various animals that have been tamed and made fit for a human use.

20. How many types of apples are there?
Hybrid Fruits
Nectarcots
Pluots
How many types of apples are there?

21. Assignment:
Successfully create a Venn Diagram or Double Bubble Map by completing the three tasks:
You must correctly classify all essential terms & concepts in their correct spot on the map.
Give 2 examples for each type category supplied by the notes.
Research and come up with one additional example for each category.

22. Essential Terms & Concepts
Survival of the Fittest
Survival of the useful / Artificial Selection
Organisms have variations
Some variations are better than others, but for different reasons
Organisms survive and thrive with the help of humans
More offspring are born than will survive and reproduce
Mutations appear randomly
Organisms are bred for desired mutations and traits
Organisms that are better suited for their environment are more likely to survive and pass on their better adapted traits.
Organisms that are identified as ideal are allowed to breed and pass their traits to further generations.

23. Venn Diagram Example
Selective Breeding
Natural Selection

24. Double Bubble Map Example
Natural
Selection
Selective Breeding

25. Selective breeding in corn
Additional Resources
Selective breeding in corn
resource/Variation-in-a-Species /