evolution i
DESCRIPTION
EVOLUTION I. e volution: -change over time E volution (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 - PowerPoint PPT PresentationTRANSCRIPT
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EVOLUTION I
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evolution:-change over timeEvolution (Darwin’s Theory):
-modern organisms came from ancient organisms
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Darwin’s observations:-diversity in similar ecosystems-living organisms look like fossils-Galapagos Islands
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Darwin’s Finches-13 species 1 common ancestor-uniquely adapted to its habitat-difference in beak shape & size
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Adaptation- inherited characteristic that increases an organism’s chance for survivalphysical/behavioral
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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
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FitnessAbility to survive and reproduce!
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Checking For UnderstandingWhat is a polar bear’s white fur
considered? ADAPTATION
What is the ability to survive and reproduce considered?
FITNESS
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Checking for Understanding What is this animal’s adaptation?
Bill
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Checking for UnderstandingWhat is change over time?
EVOLUTION
Fill in the blank..Darwin theorized that ____ organisms
came from ancient organism. MODERN
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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
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Evidence for EvolutionTurn to pg. 108Title the Page “Evidence for Evolution”
Divide the page into roughly 9 boxes.
Number the boxes 1-9.
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#1
1.Fossil Record-evidence of changing life forms over millions of years
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#2 Homologous Structures-similar
structures arising from a common ancestor
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#3 Analogous StructuresSame function but no common ancestry
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#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
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#5 Similar Embryology:
Vertebrates form in the same way in early stages of development.
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#6-Vestigial StructuresNo function, and resembled
other organismsEx: coccyx (human tail
bone), Appendix
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#7Checking for UnderstandingWhat serves as evidence that life
forms have been changing for millions of years?
FOSSIL RECORD
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#8 Checking for UnderstandingWhat proves that vertebrates
develop in the same way early on? SIMILAR EMBRYOLOGY
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#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.