Intron do not face selective pressure to produce a polypeptide with a useful sequence hence highly variable.

TLS Online TPP Program

#Id: 9424

#Unit 11. Evolution and Behavior

Parental investment - Parental investment refers to the contributions each sex makes in producing and rearing offspring.

TLS Online TPP Program

#Id: 1771

#Unit 4. Cell Communication and Cell Signaling

An antigen presented to T cells without appropriate costimulation results in a form of tolerance known as anergy.

TLS Online TPP Program

#Id: 9469

#Unit 4. Cell Communication and Cell Signaling

IL-2 receptor complex activates

STATs 1, 3, and 5 but not STATs 2 or 4

TLS Online TPP Program

#Id: 611

#Unit 2. Cellular Organization

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

TLS Online TPP Program

#Id: 7680

#Unit 1. Molecules and their Interaction Relevant to Biology