EVOLUTION I
Dec 29, 2015
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.