The Dorsal blastopore region of amphibian embryo- Organizer

TLS Online TPP Program

#Id: 10413

#Unit 4. Cell Communication and Cell Signaling

Angiogenesis

The developmental process for the formation of blood vessels that are needed to supply nutrients to a growing tumor

TLS Online TPP Program

#Id: 1600

#Unit 5. Developmental Biology

Convergent extension is responsible for the progression of the streak.

TLS Online TPP Program

#Id: 5881

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 3405

#Unit 3. Fundamental Processes

SOS response in E. coli: 

The LexA protein is the repressor in this system, which has an operator site near each gene. Because the RecA gene is not entirely repressed by the LexA repressor, the normal cell contains about 1,000 RecA monomers. 

TLS Online TPP Program

#Id: 3418

#Unit 3. Fundamental Processes

NHEJ is a backup system in yeast, but in higher cells it is the principal pathway by which breaks are repaired.