18633.Which one of the following is an economically important marine fish?
Rohu
Catla
Hilsa
Cyprinus
18635.Rhizobium induced root nodules are internally pinkish due to
Carotene
Leghaemoglobin
Haemoglobin
Xanthophyll
18639.Some commonly used earth worm species
Eisenia fetida
Perionix excavatus
both 1 and 2 are correct
neither 1 nor 2 is correct
18640.Degradation of organic wastes by using earth worms is called
Vermicomposting
Compost bedding
Humus
none of the above