The answer probably lies in the fact that repression of the trp operon is weak—much weaker.

TLS Online TPP Program

#Id: 2140

#Unit 9. Diversity of Life Forms

Darwin have agreed that all animals with vertebrae form a single phylogenetic branch of species that share a common ancestor.

TLS Online TPP Program

#Id: 2141

#Unit 9. Diversity of Life Forms

Phylogenetic relationships among species are estimated from similarities and differences.

TLS Online TPP Program

#Id: 2142

#Unit 9. Diversity of Life Forms

Phylogenetic relationships are based on,

a. Plesiomorphic character

b. Apomorphic character

TLS Online TPP Program

#Id: 2143

#Unit 9. Diversity of Life Forms

Plesiomorphic character- Primitive/unchange from ancestor Synplesiomorphic character- Primitive share ancestral character

TLS Online TPP Program

#Id: 2144

#Unit 9. Diversity of Life Forms

Apomorphic character- Derived specialized character

a. Synapomorphic character- Derived trait is share

b. Autapomorphic character- Derived trait that is unique to taxon

TLS Online TPP Program

#Id: 2145

#Unit 9. Diversity of Life Forms