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Ch 14,15 Biology: Exploring Life Stratton

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1 Ch 14,15 Biology: Exploring Life Stratton
Natural Selection Ch 14,15 Biology: Exploring Life Stratton Click here for Birds on an Island Lab Click here for Click here for Ch 15 Stabilizing Selection Lab

2 Charles Darwin 14.1 and 14.2 Biology 1 Stratton

3 14.1 Darwin’s Accomplishments
Before Darwin Leading theory of inheritance – Lamarck

4 14.1 Darwin’s Accomplishments
Darwin’s trip Ship: Job: Hobby: Findings:

5 14.1 Darwin’s Accomplishments
Publishes The Origin of Species 1859: 1,250 copies 2 main points Ancestry Selection

6 14.1 Darwin’s Accomplishments
Natural selection - From Pearson Education Biology: Exploring Life, 2004

7 14.1 Darwin’s Accomplishments
Concept Check 14.1 What is natural selection? Which of the following is an adaptation: the sharp teeth of a house cat, or a scar on the cat's ear? Explain.

8 14.2 Evidence for Natural Selection
Fossil Record

9 14.2 Evidence for Natural Selection
Geographic distribution Placental vs. Marsupial Island Bio-Geography eschscholtzii, a ring species

10 14.2 Evidence for Natural Selection
Homologous structures From Pearson Education Biology: Exploring Life, 2004

11 14.2 Evidence for Natural Selection
Analogous structures

12 14.2 Evidence for Natural Selection
Vestigial Structures

13 14.2 Evidence for Natural Selection
Concept Check 14.2 Why are older fossils generally in deeper rock layers than younger fossils? How can evolutionary theory explain why Australia is home to relatively few native placental mammals? What are homologous structures? Return to Main Menu

14 Natural Selection 14.3, 14.4, 14.5 Biology 1 Stratton

15 14.3 Theory of Natural Selection
# offspring produced Adapted Not adapted Variations exist in populations Human hair color Wolf coloring patterns From

16 14.3 Theory of Natural Selection
Artificial Selection Selective Breeding Ex. toy poodles Ex. watermelon

17 14.3 Theory of Natural Selection
Changes over long periods of time Successful individuals have traits fit for environment Selective Breeding Changes in a few generations Successful individuals have traits humans like

18 14.3 Theory of Natural Selection
From

19 14.3 Theory of Natural Selection
Concept Check 14.3 In Darwin's view, what conditions lead to a struggle for existence among individuals in a population? What is the goal of artificial selection? Why does a specific pesticide become less effective over time?

20 Genetic Drift Bottleneck effect Founder Effect 14.4 Microevolution
Ex. Cheetahs - Ex. Pandas - Ex. Humans – Founder Effect

21 14.4 Microevolution Concept Check 14.4 What is a gene pool?
How has genetic drift affected the world's populations of cheetahs? Describe what is meant by a "biologically fit" organism.

22 14.5 Natural Selection / Health
Sickle Cell Advantage? Disadvantage? Antibiotic Resistant Bacteria

23 14.5 Natural Selection / Health
Concept Check 14.5 Under what conditions is the sickle cell allele beneficial to a heterozygous individual? Identify a possible risk of overuse of antibiotics. Return to Main Menu

24 Evolution Ch 15 Biology 1 Stratton

25 15.1, 15.2 Species Defined Morphologically Distinct

26 15.1, 15.2 Species Defined Reproductive Isolation Timing
Eastern spotted Western spotted

27 15.1, 15.2 Species Defined Reproductive Isolation Behavior Fireflies
Timing Behavior Fireflies Birds

28 15.1, 15.2 Species Defined Reproductive Isolation Gametic Pollen
Timing Behavior Gametic Pollen Eggs / Sperm

29 15.1, 15.2 Species Defined Reproductive Isolation Geographic Timing
Behavior Gametic Geographic

30 15.3 Fossil Record Formation of fossils Same age rocks =
Periods of Time

31 15.3 Fossil Record (FILL IN NOTES)

32 15.3 Fossil Record (cont.) Geologic Time Scale Relative dating
Radiometric dating Fossil Dating Return to Main Menu

33 15.3 Fossil Record (FILL IN NOTES)
Return to Main Menu


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