11.
Development of female gametophyte directly from megaspore mother cell without meiosis is called

12.
Bacteria with cell wall are included in

13.
Who advanced the gene for gene concept of disease resistance and susceptibility

14.
Bees are important to agriculture as they

15.
Nitrogen is an important constituents of

16.
Silica gel was 1st developed for preservation of

17.
Which of the following organic manures has the narrowest C/N ratio?

18.
The effective concentration of HC toxin in μg/ml is

19.
The root-knot nematode generally have interaction with

20.
Calcium, magnesium and sulphur are defined as