MCQ
In the extrinsic clotting pathway, the active factor $VII$ activates which factors?
- A$X$ and $XI$
- B$IX$ and $XI$
- ✓$IX$ and $X$
- D$XI$ and $XII$
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$(i)$ Contractile vacuole takes part in osmoregulation and excretion.
$(ii)$ Food vacuole is formed by engulfing the food particles.
$(iii)$ The vacuole is bound by a double membrane called tonoplast.
$(iv)$ Vacuole can occupy upto $90$ percent of the volume of the cell.