Clement’s organismic model- Competition causes sharp boundaries between groups of species; certain species group together.

TLS Online TPP Program

#Id: 9069

#Unit 4. Cell Communication and Cell Signaling

Inactive PKA is a tetramer consisting of- 

two regulatory (R) subunits

two catalytic (C) subunits

TLS Online TPP Program

#Id: 2172

#Unit 11. Evolution and Behavior

Selection coefficient - which is the relative intensity of selection against a  genotype

Selection coefficient (1 - W)

TLS Online TPP Program

#Id: 4479

#Unit 13. Methods in Biology

Formaldehyde a common fixative, crosslinks amino groups on adjacent molecules

TLS Online TPP Program

#Id: 5813

#Unit 7. System Physiology – Animal

Zona glomerulosa lacks 17α-hydroxylase

Increases Na+ reabsorption Increases K+ secretion Increases H+ secretion

TLS Online TPP Program

#Id: 938

#Unit 5. Developmental Biology

Induced pluripotent stem cell (iPSC) with the pluripotency of an embryonic stem cell. These genes were 

a. Sox2 and Oct4 (Oct3, Oct3/4, and Pou5f1) -which activated Nanog and other transcription factors that   established pluripotency and blocked differentiation

b. c-Myc which opened up chromatin and made the genes accessible to Sox2, Oct4, and Nanog

c. Klf4 -which prevents cell death