Bio Lecture 4/19

Front 1

tetrapods

Back 1

4 limbs
evolved from lobe finned fish in the paleozoic
fist one were stocky predators w/ short limbs
lots of transitional species in fossil record

Front 2

tetrapod specific adaptations

Back 2

four limbs and feet with digits, neck which allows separate movement of the head
fusion of the pelvic girdle to the backbone
absence of gills
ears for detecting airborne sounds

Front 3

origin of limbs

Back 3

some ray finned fishes use limb- like fins for walking on

Front 4

reptiles

Back 4

clade includes the tuataras, lizards, snakes, turtles, crocodilians, birds, and some extinct groups
reptile have scale that create a waterproof barrier

Front 5

amniotes

Back 5

group of tetrapods whose living members are the reptilesl including birds, and mammals

Front 6

evolution of feathers

Back 6

early feathers might have helped dinosaurs
by 150 mya feathered theropods had evolved into birds

Front 7

what is the oldest bird known

Back 7

archaeopteryx***

Front 8

summery progression: tissue layers and shape

Back 8

sponges have no symmetry no tissues,

organisms with radial symmetry and diploblastic

organisms with bilateral symmetry have 3 tissues/ triploblastic

bilateral symmetry confirms a head

Front 9

a

Back 9

a