4:2 relate the adaptability of organisms in an environment to their inherited traits and structures

Poison Dart Frog

Darwin 1820 English, natural scientist Why are organisms different? Why are organisms similar? Why are there so many different types of organisms?

Traits that offer survival

Traits that provide an advantage for survival in one environment but not other environments CAMOUFLAGE ? MIMICRY ? Predator adaptation-helps capture prey Prey adaptation-avoids predators

Flies acting like bees

What are these acting like? Walking stick Eastern Tiger Swallowtail Caterpillar

ADAPTATIONS (traits that allow for survival): ANTIFREEZE FISH ADAPTATIONS (traits that allow for survival): ANTARCTIC TOOTHFISH SLOW HEARTBEAT 1@6SEC. LIVES 40 YEARS 200 LBS. PROTEIN THAT ACTS LIKE ANTIFREEZE!

Traits Inherited Acquired

Natural selection 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

Why so many species Increases the chance that at least some organisms adapt and survive any major changes in the environment.

Artificial selection (manmade) Dog breeds Milk producers

Reproductive isolation Allopatric-Geographic Sympatric-Behavior

Structure and survival Buoyancy needs less structural support

Structural adaptations for flight Wings and hollow bones Behavioral Migration

Structural adaptations Internal skeleton Exoskeleton

Egg laying vs. live birth Egg has nutrients until birth Easier to lay eggs than carry that many Protects from predators Maintains constant temp. for survival