#Question id: 2057
#Unit 4. Cell Communication and Cell Signaling
Lymph nodes and the spleen are the most highly organized secondary lymphoid organs. T-cell and B-cell activity are separated into distinct microenvironments in both. T cells and B cells are found in
#Question id: 19080
#Unit 6. System Physiology – Plant
#Question id: 12245
#Unit 10. Ecological Principles
#Question id: 20981
#Unit 12. Applied Biology
#Question id: 589
#Unit 1. Molecules and their Interaction Relevant to Biology
When varying the substrate concentration at a fixed concentration of enzyme it is observed that at low concentrations of substrate the reaction is ________,while at high concentrations of substrate the reaction is ________.