Organism Adaptations

2011

Timeline of Major Events4.5BYA to 544MYA

1) First life on earth = single celled organisms2) First plantlike organisms, oxygen = algae3) First many-celled organisms = sponges4) Soft-shelled, no backbone, marine animals

common5) First eyes and digestive tracts thanks to

worms6) Jellyfish give us first nerve and muscles

Timeline of Major Events544 to 410MYA

Arthropods-exoskeletons-segmented body parts-jointed appendages

Early Land Plants-reproduced with spores-had strong stalks to hold them up out of water-thicker “skin” to stop from drying out

Adaptations (410 to 286 MYA)

What adaptations did you notice…

AmphibiansBackbonesTeethSkincan take in oxygenFreshwaterEggsLegsEyelids and eardrums

PlantsConesPollenSeeds (don’t need water to reproduce)Needles (help retain moisture)Fish

BackboneGillsTeethEggsOne-way traffic guts

Adaptations (286 to 65MYA)

Reptiles-scales and watertight skin-watertight eggs-backbones-body temp that depends on the environment

Flowering Plants- petals- color- seeds and pollen- Broad leaves

Adaptations (65mys to 2011)Birds

-regulate own body temp-feathers

-watertight, hard-shelled eggs-backbone

-hollow bones-beaks

-complex

Mammals-regulate own body temp

-have hair-most give birth to live young

-backbone-complex