1. Warm Up
04/03/17
How do you think fossils and evolution are connected?

2. Fossils, Evolution, Classification, and Biodiversity

3. “Theory” or Theory
A scientific theory is tested and supported with evidence. It isn’t just some flimsy idea.
We use the term “theory” to talk about an idea, but in science and theory is actually supported with testable experiments and supported with evidence.

4. Fossil
A fossil is preserved evidence of an organism

5. Dating fossils Relative dating: how fossils are aged
Law of superposition:

6. Evolution
Changes in organisms over time

7. Natural vs Artificial Selection
Artificial:The evolution of organisms driven by humans Dog breeds, Plant breeds
Natural: :When members are better equipped for certain environments; those that aren’t die out

8. Analogous vs Homologous Structures

9. Fitness
The measure of usefulness an individual trait makes the next generation
Some traits make certain individuals more “fit”

10. Today’s assignment: Fossils handout Adaptations handout
Test corrections- tell why the new answer is the correct one! Due today!

11. Warm Up
04/04/17

12. Classification
Taxonomy: Identifies, names, and classifies species based on natural relationships
Binomial nomenclature: each species has a two part scientific name:
Entire name is italicized, or underlined, and the first part of the name begins with a capital letter
Example Acer rubrum (Acer is the genus, rubrum is the species)

13. Levels of Classification
Kingdom
Phylum
Class
Order
Family
Genus
Species

14. Cladogram
A branching diagram that represents evolutionary history of a group

15. Today’s assignment
Dichotomous keys
Work on vocabulary

17. Population Dynamics and Biodiversity
Terms to cover:
Carrying capacity Extinction Habitat fragmentation
Density-dependent factor Genetic diversity Invasive species
Density-independent factor Species diversity Biodiversity
Biological magnification Ecosystem diversity Eutrophication

18. Population Dynamics Carrying capacity: Density-dependent factor:
Maximum # of individuals that an environment can support
Density-dependent factor:
Any environmental factor that depends on population size. Ex. disease, parasites, predation, competition
Density-independent factor:
Any environmental factor that does not depend on population size
Ex. Fires, hurricanes, flooding

19. Biodiversity Biodiversity: Ecosystem diversity: Extinction:
Variety of life in an area; higher biodiversity = healthy ecosystem
Ecosystem diversity:
All the ecosystems in the biosphere
Extinction:
When the last member of a species dies

20. Biodiversity Species diversity: Biological magnification:
Genetic Diversity
Variety of genes in a population
Species diversity:
Number of different species in a community
Biological magnification:
The increase of concentration in organisms high in the food chain

21. Biodiversity: Eutrophication: Habitat fragmentation: Invasive Species:
Nutrient overloading in a body of water
Habitat fragmentation:
Separation of an ecosystem into small pieces of land
Invasive Species:
Non-native species brought into an area