MCQ
In short day plants, flowering is induced by.
- ALong night.
- BShort photoperiod and interrupted long night.
- CPhotoperiod less than $12$ hours.
- ✓Photoperiod below a critical length and uninterrupted long night.
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$(i)$ It is a membrane bound space found in the cytoplasm.
$(ii)$ It is bound by a single membrane called tonoplast.
$(iii)$ It contains water, sap, excretory products and other materials not useful to the cell.
$(iv)$ It has higher concentration of sap than the cytoplasm.