26.2 morphological and molecular data Flashcards
1
Q
whats morphological homology
A
the similarities of bone in the forelimbs of animals is due to the descent from a common ancestor with the same bone structure
2
Q
analogy
A
convergent evolution
3
Q
whats convergent evolution
A
similar environments and natural selection produce similar adaptations in organisms from different evolutionary lineages
(bats and birds both fly)
4
Q
analogous structures that evolved independently are called
like bat wings and bird wings
A
homoplasies
5
Q
why is studying molecular comparisons of DNA hard
A
additions and deletions change the lengths of DNA so its hard to match up the bases
6
Q
what are molecular homoplasies
A
where the bases match up coincidentally when comparing in otherwise completely different sequences
