Many species of macroparasites cannot complete their life cycles without the presence of at least two different host species

Definitive host - Exhibit sexual reproduction 

Intermediate hosts – Nonreproducing

TLS Online TPP Program

#Id: 979

#Unit 5. Developmental Biology

Wnt inhibitors secreted by the organizer are Dickkopf, Cerberus, Frzb & IGF

TLS Online TPP Program

#Id: 980

#Unit 5. Developmental Biology

Two organizer proteins, inhibit Wnt proteins during gastrulation Tiki and Notum

TLS Online TPP Program

#Id: 981

#Unit 5. Developmental Biology

Brain formation requires,  inhibiting both the Wnt and  BMP pathways.

TLS Online TPP Program

#Id: 982

#Unit 5. Developmental Biology

IGFs and FGFs in the anterior region, Initiate the receptor tyrosine kinase (RTK) signalling inhibit BMPs and Wnts pathways

TLS Online TPP Program

#Id: 983

#Unit 5. Developmental Biology

Nodal protein establishes left-right polarity, By activating Pitx2 on the left side

TLS Online TPP Program

#Id: 984

#Unit 5. Developmental Biology

Drosophila eggs undergo superficial cleavage.