Long-distance transport of three hormones that regulate shoot branching: auxins, cytokinins, and strigolactones. Auxin is produced primarily in young expanding leaves and is transported basipetally by PIN1- mediated polar auxin transport. 

TLS Online TPP Program

#Id: 9293

#Unit 6. System Physiology – Plant

Ammonium assimilation in roots

TLS Online TPP Program

#Id: 7014

#Unit 5. Developmental Biology

The types of the intracellular mechanisms used by a given stem cell are in part the downstream net result of the extracellular stimuli in its niche.

TLS Online TPP Program

#Id: 1722

#Unit 4. Cell Communication and Cell Signaling

The α chains of the FcεRI, members of the immunoglobulin superfamily, directly bind the IgE heavy chains, whereas the β and γ chains are responsible for signal transduction.

TLS Online TPP Program

#Id: 5506

#Unit 10. Ecological Principles

If individuals in one patch go extinct, other individuals in other patches survive, and they supply individuals

TLS Online TPP Program

#Id: 7217

#Unit 5. Developmental Biology

T cells initiate the adaptive immune response by interacting MHC on antigen-presenting cells that have been exposed to pathogens.