classification
Perissodactyla=odd toes rhino tapir; even=deer/pig, hippo/whale.
Equus ferus=horse, asses: donkey, zebra; other Equidae extinct! Hominidae=apes, order Primates.
APPEARANCE deceiving!
tree
PREVIEW video exercise
which is from
PHELAN ebook,
may need to
CLICK for fullscreen.
Do
SELF quiz: bird & mammal=tetrapods!
phylogeny
SAY monophyletic.
Phylum Chordata -> Class Mammalia; milk must have 4 legs, can lose legs! I have white hair.
HAIR; keratin/skin. Humpback bumps tubercles -> follicle sweat/sebaceous glands, nipples.
WHALE is a mammal, sings. Milk: prolactin; oxytocin let-down. Snake=eel=worm, lizard wo legs: python Sonic hedgehog?
Starfish 5 arms
BILATERAL middle arm like unicorn, Cyclops.
How snakes lost their legs: Sonic Hedgehog mutation
How whales lost their hind legs: comparative embryology (and Sonic Hedgehog)
Explore the tree of life
Tree of Life Explorer
PBS-YourInnerFish
INNERMONKEY 43:10 3 month-old Pig-tailed Macaque object permanance; 47:25 shark brain
INNERFISH 38:40 Fruit fly; 39:50
Sonic Hedgehog
gene; 40:40 chick digits; 42:30 human hand
clade
Bring
BIRD skeleton in 1305. Gotta invite all to reunion! Reptiles + turtles, snakes.
Archaeopteryx the feathered dinosaur grows like a dinosaur, not a bird
convergent
Common ancestor of birds & insects = Bilaleteria -> Nephrozoa (coelom) -> protostome & deuterostome 500
MYA.
analogous
Afrotheria 100
MYA in Africa - I just learned myself of
THIS convergent example.
FLASH hyena like lion; wolf & wild dogs
NONRETRACTABLE convergent evolution!
BIOGEOGRAPHY where do Asian elephants come from (Forest/Savannah)?
Mammoths had
MOLARS like bats;
Beringia 15
KYA.
Asian-American Land Bridge (Beringia) - for mammoths and humans
domains
No PROKARYA; 3.6
BYA (Earth 4.6)
MAP animals!
What's
WRONG with picture? 3 Protists!
Play Phelan video on micro/macro evo -> Woes rRNA domains, horizontal gene transfer, viruses
speciation-allopatric
SPECIATION means how arise?
ERRATA grassquit/tanager 2.3 MYA, not the
ONLY finch Tiaris obscura!
speciation-sympatric
strawberries, oysters, cotton, cacoa; Tragopogon=goatsbeard
SUNFLOWER family
Triploid Watermelon: artificial selection with Colchicine
Triploid Oysters: cannot reproduce, but grow fast
Tragopogon: Understanding the evolution of polyploidy
Polyploidy everywhere 3:00-4:40 sugar cane, banana, cotton, cacoa, wheat, strawberry; oysters
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