4:2 relate the adaptability of organisms in an environment to their inherited traits and structures
TRANSCRIPT
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4:2 RELATE THE ADAPTABILITY OF ORGANISMS IN AN ENVIRONMENT TO THEIR INHERITED TRAITS AND
STRUCTURES
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POISON DART FROG
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Why are organisms different?
Why are organisms similar?
Why are there so many different types of organisms?
DARWIN 1820ENGLISH, NATURAL SCIENTIST
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TRAITS THAT OFFER SURVIVAL
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TRAITS THAT PROVIDE AN ADVANTAGE FOR SURVIVAL IN ONE ENVIRONMENT
BUT NOT OTHER ENVIRONMENTS
CAMOUFLAGE ? MIMICRY ?
Prey adaptation-avoids predatorsPredator adaptation-helps capture prey
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FLIES ACTING LIKE BEES
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Walking stickEastern Tiger Swallowtail
Caterpillar
WHAT ARE THESE ACTING LIKE?
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ADAPTATIONS (traits that allow for survival):
SLOW HEARTBEAT 1@6SEC.
LIVES 40 YEARS200 LBS.PROTEIN THAT ACTS
LIKE ANTIFREEZE!
ANTARCTIC TOOTHFISH
ANTIFREEZE FISH
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Inherited Acquired
TRAITS
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Some variation in inherited traits within the species
Some of these traits will give an advantage over others in surviving and reproducing
These will be more likely to have more offspring
NATURAL SELECTION
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Increases the chance that at least some organisms adapt and survive any major changes in the environment.
WHY SO MANY SPECIES
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Dog breeds Milk producers
ARTIFICIAL SELECTION (MANMADE)
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Allopatric-Geographic Sympatric-Behavior
REPRODUCTIVE ISOLATION
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Buoyancy needs less structural support
STRUCTURE AND SURVIVAL
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StructuralWings and hollow bones
Behavioral Migration
STRUCTURAL ADAPTATIONS FOR FLIGHT
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Internal skeleton Exoskeleton
STRUCTURAL ADAPTATIONS
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Egg has nutr ients unt i l b i r thEasier to lay eggs than carry that many
Protects from predatorsMaintains constant temp. for survival
EGG LAYING VS. LIVE BIRTH