In the peripheral nervous system, myelin is compacted when the extracellular portions of a membrane protein called protein zero (P0 ) lock to the extracellular portions of P0 in the apposing membrane

TLS Online TPP Program

#Id: 2148

#Unit 9. Diversity of Life Forms

TLS Online TPP Program

#Id: 2149

#Unit 9. Diversity of Life Forms

Many phenotypic traits are genetically variable within species, they can readily evolve by natural selection and genetic drift.

TLS Online TPP Program

#Id: 2150

#Unit 9. Diversity of Life Forms

It is not surprising that size, shape, coloration, and many other traits undergo convergent evolution in diverse lineages

TLS Online TPP Program

#Id: 2151

#Unit 9. Diversity of Life Forms

Only four possible states of a particular site in a DNA sequence. A single base pair difference among species provides little reliable evidence about their phylogeny

TLS Online TPP Program

#Id: 2152

#Unit 9. Diversity of Life Forms

Use different parts of the genome to estimate different parts of a phylogeny.

TLS Online TPP Program

#Id: 2153

#Unit 9. Diversity of Life Forms

Rates of molecular evolution vary among DNA sites, among genes, and among lineages of organisms.