IV.Gymnosperm

Polyembryony - common

Ovules - seeds

Seeds two or more cotyledons

TLS Online TPP Program

#Id: 9710

#XL - T Zoology

Cdc24 = SOS

Cdc42 = Ras

TLS Online TPP Program

#Id: 9711

#XL - T Zoology

GTP-bound Cdc42, binds to and activates the Ste20 kinase.

TLS Online TPP Program

#Id: 9712

#XL - T Zoology

Ste20 serves as a MAPKKK kinase.

TLS Online TPP Program

#Id: 9713

#XL - T Zoology

Ste20 phosphorylates and activates Ste11, a serine/threonine kinase

TLS Online TPP Program

#Id: 9714

#XL - T Zoology

Ste11 analogous to Raf and other mammalian MEK kinase (MEKK) proteins.

TLS Online TPP Program

#Id: 9715

#XL - T Zoology

Activated Ste11 then phosphorylates Ste7, a dual-specificity MEK.