Dollo’s law: A biological generalization positing that complex characters, once lost in evolution, are extremely unlikely to reappear and thus the loss of complex characters is virtually always irreversible.

TLS Online TPP Program

#Id: 8285

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 9867

#XL - R Botany

TLS Online TPP Program

#Id: 9405

#XL - T Zoology

Costs & benefits of territorial defense

Cost

Defending a territory requires time & energy and may, if aggressive defense is  needed, may pose some risk of injury.

Benefits‐

The improved access to resources represents  the 'benefit(s)' of territory defense.

TLS Online TPP Program

#Id: 8942

#XL - T Zoology

In S. cerevisiae, during interphase and early mitosis, Cdc14 is sequestered and inactivated in the nucleolus. 

TLS Online TPP Program

#Id: 8611

#XL - T Zoology

Nonphosphorylated CDK bound to one of its cyclin partners has minimal but detectable protein kinase activity in vitro, although it may be essentially inactive in vivo.