Improvement in food resources

Improvement of food resources Worksheet-7

31.  Which one of the following fish is a bottom feeder?

A.  Rohus           B.  Mrigals        C. Grass carps  D. Catlas

32.  Which one of the following nutrients is not available in fertilizers?

A. Nitrogen                                    B. Phosphorus

C. Iron                                             D. Potassium