EVOLUTION I

evolution:-change over timeEvolution (Darwin’s Theory):

-modern organisms came from ancient organisms

Darwin’s observations:-diversity in similar ecosystems-living organisms look like fossils-Galapagos Islands

Darwin’s Finches-13 species 1 common ancestor-uniquely adapted to its habitat-difference in beak shape & size

Adaptation- inherited characteristic that increases an organism’s chance for survivalphysical/behavioral

Survival of the Fittest- individuals with the most successful adaptations survive and reproduce more successfully

Natural Selection- changes in the inherited characteristics of a population & increases a species’ fitness in its environment

FitnessAbility to survive and reproduce!

Checking For UnderstandingWhat is a polar bear’s white fur

considered? ADAPTATION

What is the ability to survive and reproduce considered?

FITNESS

Checking for Understanding What is this animal’s adaptation?

Bill

Checking for UnderstandingWhat is change over time?

EVOLUTION

Fill in the blank..Darwin theorized that ____ organisms

came from ancient organism. MODERN

Checking for UnderstandingDarwin studied what kind of birds

on the Galapagos Islands?

FINCHES

Changes in the inherited characteristics of an entire species

is considered what?

NATURAL SELECTION

Evidence for EvolutionTurn to pg. 108Title the Page “Evidence for Evolution”

Divide the page into roughly 9 boxes.

Number the boxes 1-9.

#1

1.Fossil Record-evidence of changing life forms over millions of years

#2 Homologous Structures-similar

structures arising from a common ancestor

#3 Analogous StructuresSame function but no common ancestry

#4 Checking for UnderstandingA human forearm to a cat’s forelimb is considered what?

HOMOLOGOUS

A butterfly’s wing to a bird’s wing is considered what?

ANALOGOUS

#5 Similar Embryology:

Vertebrates form in the same way in early stages of development.

#6-Vestigial StructuresNo function, and resembled

other organismsEx: coccyx (human tail

bone), Appendix

#7Checking for UnderstandingWhat serves as evidence that life

forms have been changing for millions of years?

FOSSIL RECORD

#8 Checking for UnderstandingWhat proves that vertebrates

develop in the same way early on? SIMILAR EMBRYOLOGY

#9 CLOSURE ACTIVITY

How does an adaptation relate to survival of the fittest?

Those most fit to survive has the most successful adaptations,

otherwise inherited characteristics.