Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
evolution definitions
|
change over time, universal common descent, creative power of natural selection
|
|
|
universal common descent, natural selection, hereditary, mutation
|
neodarwinism
|
|
|
study of genes ina populatuon
|
population genetics
|
|
|
how do we study the past?
|
reconstruct history with evidence
|
|
|
where does new info come from?
|
mutation
|
|
|
what does the trunk represent?
|
common ancestor
|
|
|
the branches?
|
new species
|
|
|
the ends?
|
extinction
|
|
|
single branching tree
|
monophyletic view
|
|
|
orchard of separate trees
|
polyphyletic view
|
|
|
walls of rock arranged in layers
|
strata
|
|
|
when do triolbites first appear?
|
cambrian strata
|
|
|
when do mammals first appear?
|
triassic period
|
|
|
diagnol lines on "tree of life"
|
transitional forms
|
|
|
the straight lines?
|
stasis
|
|
|
what do dotted lines represent?
|
gaps that still need to be filled
|
|
|
permian and triassic period; extinct; have both traits
|
mammal-like reptiles
|
|
|
bird with toothed jaw like a reptile and feathers like a bird
|
Archeopteryx
|
|
|
how long ago did the cambrian explosion occur?
|
530 million years ago
|
|
|
how long did it last?
|
10 million years
|
|
|
how much of the animal phyla suddenly appeared?
|
more than half
|
|
|
how long ago did mammalian radiation occur?
|
65-55 million years ago
|
|
|
how many of the orders suddenly appear?
|
15
|
|
|
flowering plants suddenly appear in cretaceous period
|
angiosperm big bloom
|
|
|
sudden appearance of organisms (turtles)
|
late triassic, no intermediates
|
|
|
stasis/ stability of form (ginkos, comb jelly, shark)
|
some animals havent changed at all
|
|
|
sequencing problems in transitional forms
|
not enough; statistically abnormal; intermediates we have are all at the same time
|
|
|
size problems?
|
mammal like reptile sequence- sizes are not even close to consistent
|
|
|
time problems?
|
found so apart, we don't know if they are even actually related
|
|
|
still common descent, but branches split off really quickly
|
punctuated equilibrium
|
