If a stem cell divides symmetrically, have the ability to produce either two stem cells (increasing the stem cell pool by one) or two committed cells (decreasing the pool by one). This is called symmetrical renewing or symmetrical differentiating.

TLS Online TPP Program

#Id: 3969

#Unit 2. Cellular Organization

An unrestrained supercoil in the DNA path creates tension, but no tension is transmitted along DNA when a supercoil is restrained by protein binding.

TLS Online TPP Program

#Id: 2178

#Unit 11. Evolution and Behavior

Mutation and natural selection act as opposing forces on detrimental alleles.

TLS Online TPP Program

#Id: 9528

#Unit 6. System Physiology – Plant

Viruses targets endocytic recycling pathway for cell‐to‐cell spread

TLS Online TPP Program

#Id: 9135

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5327

#Unit 7. System Physiology – Animal

Isovolumetric Ventricular Relaxation

begins after the ventricles are fully repolarized, marked by the end of the T wave on the ECG.