4:2 RELATE THE ADAPTABILITY OF ORGANISMS IN AN ENVIRONMENT TO THEIR INHERITED TRAITS AND

STRUCTURES

POISON DART FROG

Why are organisms different?

Why are organisms similar?

Why are there so many different types of organisms?

DARWIN 1820ENGLISH, NATURAL SCIENTIST

TRAITS THAT OFFER SURVIVAL

TRAITS THAT PROVIDE AN ADVANTAGE FOR SURVIVAL IN ONE ENVIRONMENT

BUT NOT OTHER ENVIRONMENTSCAMOUFLAGE ? MIMICRY ?

Prey adaptation-avoids predatorsPredator adaptation-helps capture prey

FLIES ACTING LIKE BEES

Walking stick Eastern Tiger Swallowtail Caterpillar

WHAT ARE THESE ACTING LIKE?

ADAPTATIONS (traits that allow for survival):

SLOW HEARTBEAT 1@6SEC.

LIVES 40 YEARS200 LBS.PROTEIN THAT ACTS

LIKE ANTIFREEZE!

ANTARCTIC TOOTHFISH

ANTIFREEZE FISH

Inherited Acquired

TRAITS

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

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

WHY SO MANY SPECIES

Dog breeds Milk producers

ARTIFICIAL SELECTION (MANMADE)

Allopatric-Geographic Sympatric-Behavior

REPRODUCTIVE ISOLATION

Buoyancy needs less structural support

STRUCTURE AND SURVIVAL

StructuralWings and hollow bones

Behavioral Migration

STRUCTURAL ADAPTATIONS FOR FLIGHT

Internal skeleton Exoskeleton

STRUCTURAL ADAPTATIONS

Egg has nutr ients unt i l b i r thEasier to lay eggs than carry that many

Protects from predatorsMaintains constant temp. for surv ival

EGG LAYING VS. LIVE BIRTH