Territory

It is an area of land that is actively defended against animals of the same species or against animals of the same species and gender.

TLS Online TPP Program

#Id: 1041

#Unit 5. Developmental Biology

The cells that make up the limb bud are derived from the 

1. posterior lateral plate mesoderm

2. adjacent somites

3. bud’s overlying ectoderm

TLS Online TPP Program

#Id: 1042

#Unit 5. Developmental Biology

Limb field - All the cells are capable of forming a limb on their own.

TLS Online TPP Program

#Id: 1043

#Unit 5. Developmental Biology

The positional information needed to construct a limb has to function in a three-dimensional coordinate system:

Proximal-distal axis

Anterior-posterior axis

Dorsal-ventral axis

TLS Online TPP Program

#Id: 1044

#Unit 5. Developmental Biology

The limb bud is regionalized into 3 functional domains

1. Progress zone

2. Zone of polarizing activity

3. Apical ectodermal ridge

TLS Online TPP Program

#Id: 1045

#Unit 5. Developmental Biology

The highly proliferative mesenchyme that fuels limb bud growth is known as the progress zone mesenchyme

TLS Online TPP Program

#Id: 1046

#Unit 5. Developmental Biology

Fgf10 is the major active factor in the PZ.