11.
Ozone is toxic to expanding leaves of almost all types of plant at the concentration of equal or more than

12.
Boron assists in

13.
A virus that infects bacteria and destroys them is called as

14.
Ions are absorbed by plants through

15.
Urin contains only

16.
Major role of phosphorus in plant metabolism is

17.
Powdery mildew include in

18.
The presence of VAM enhances uptake of nutrients in general but particularly of

19.
Maximum starch is manufactured by

20.
In C3 plants first stable product of photosynthesis during dark reaction is