Zadanie 10
Chemical messages coordinate cells and whole organisms. (a) Describe bacterial quorum sensing. (b) Outline roles of calcium ions in animal-cell signalling. (c) Explain how plant hormones regulate growth through signalling.
Balancing root and shoot growth with hormones
Explain reciprocal transport and interactions of auxin and cytokinin in coordinating plant growth.
Tę umiejętność sprawdza 5 zadań wzorowanych na arkuszach IB z lat 2024–2026.
Zadania sprawdzające tę umiejętność: 5 Otwórz w wyszukiwarce z filtrami
Zadanie 27
Plant tissue pieces are cultured with different concentrations of two growth regulators. The diagram summarizes the responses. Which pair could account for these patterns? A. P: ethylene; Q: abscisic acid B. P: cytokinin; Q: auxin C. P: glucose; Q: nitrate D.…
- Materiał graficzny
Zadanie 4c
State two growth-regulating phytohormones and their principal production sites in this seedling.
Zadanie 3b
(i) Predict a visible difference between shoot meristem-derived cells grown with a growth-promoting auxin concentration and cells grown without it. (ii) State another hormone that interacts with auxin to coordinate shoot growth.
- Materiał graficzny
Zadanie 34
How can auxin contribute to a plant’s growth response? A. By permanently preventing cell-wall expansion B. By preventing responses to directional light C. By making all plant organs grow at an identical rate D. By regulating growth associated with the shoot…