The T-cell receptor link to MHC–peptide is enhanced by interaction between MHC class II on the antigen-presenting cells with the following molecule on the T-cell:

TLS Online TPP Program

#Question id: 6978

#Unit 5. Developmental Biology

Removal of the apical ridge leads to

TLS Online TPP Program

#Question id: 6979

#Unit 5. Developmental Biology

The muscle-forming cells of the vertebrate limb come from:

TLS Online TPP Program

#Question id: 6980

#Unit 5. Developmental Biology

Teeth form from

TLS Online TPP Program

#Question id: 6981

#Unit 5. Developmental Biology

Hedgehog signaling at the compartment boundary in the Drosophila wing disc leads to the expression of what signaling molecule in the adjacent anterior cells?

TLS Online TPP Program

#Question id: 6982

#Unit 5. Developmental Biology

Which of the following genes control the final structures of appendages from each segment?

TLS Online TPP Program

#Question id: 6983

#Unit 5. Developmental Biology

In vertebrates, the heart forms from: