Zadanie 3c
Outline how ethylene can coordinate rapid ripening among neighbouring fruits.
Ethylene feedback during fruit ripening
Explain how ripening promotes ethylene release and how this reinforcing loop synchronizes rapid changes in fruits.
Tę umiejętność sprawdza 6 zadań wzorowanych na arkuszach IB z lat 2025–2026.
Zadania sprawdzające tę umiejętność: 6 Otwórz w wyszukiwarce z filtrami
Zadanie 25
A model tomato crop progresses from hard green fruit through a pale orange stage to soft red fruit. Which pattern of ethylene release and feedback is expected during rapid ripening? A. Falling ethylene with a self-amplifying loop B. Rising ethylene with a…
Zadanie 26
Unripe pears soften sooner when enclosed with a ripe apple than when kept alone. Which explanation is most appropriate? A. The apple supplies auxin through a shared vascular bundle B. Oxygen from the apple directly creates new genes in the pears C. A gaseous…
Zadanie 26
A plant signal accumulates around ripening bananas and promotes ripening in nearby fruit. Which substance acts directly in this response? A. Glucagon B. Ethylene C. Melatonin D. Testosterone
Zadanie 28
Ripening pears release a gaseous signal that stimulates neighbouring fruit to ripen and to release more of the same signal. Which substance participates in this positive-feedback process? A. Abscisic acid B. Ethylene C. Insulin D. Gibberellin
Zadanie 22
A climacteric fruit begins ripening and releases a gaseous signal that stimulates further release of the same signal. Which description fits this process? A. Ethylene-mediated positive feedback B. Auxin-mediated negative feedback that stops ripening C.…