Bio 207- Chap 26

Front 1

classfication

Back 1

species<- genus<- family<-order-< class<-phylum<-kingdom<-domain

there are 3 domains

Front 2

taxa ( singular: taxon)

Back 2

The named taxonomic unit at any level of the hierarchy

Front 3

polytomy,

Back 3

a branch point from which more than two descendant groups emerge.

Front 4

convergent evolution occurs when

Back 4

similar environmental pressures and natural selection produce similar (analogous) adaptations in organisms from different evolutionary lineages

Front 5

compare homology and analogy

Back 5

Homologous structures have the same structure but different functions- the wind of a bat and the arm of a human are homologues.

Analogous structures have the same function, but different structures- the wing of a bird and the wing of an insect are analogues.

Front 6

monophyletic

Back 6

(from the Greek meaning ~single tribe~), signifying that it consists of an ancestral species and all its descendants

Front 7

paraphyletic

Back 7

(~beside the tribe~) group, which consists of an ancestral species and some, but not all, of its descendants

Front 8

polyphyletic

Back 8

("many tribes~) group, which includes taxa with different ancestors