monophyletic group
all descendants and common ancestor
paraphyletic group
one ancestor some descendants not all
polyphyletic group
multiple ancestors and some or all descendants
homoplasy
“plastic fake”
not homology instead an example of convergent evolution. whene taxa develop similar traits but not from shared ancestry
homolgy
similarities due to shared ancestry
convergent evolution
no common ancestor but similar traits developed
divergent evolution
species from shared ancestry develop diferent traits
derived traits
not triats from ancestor but due to mutations in descendants