In flood rice, snail feed on bacteria called__________________?
In flood rice, snail feed on bacteria called__________________?
		A. Helix
B. Limnea
C. Azolla
D. None of the above
		A. Helix
B. Limnea
C. Azolla
D. None of the above
		A. 75°C
B. 42°C
C. 40°C
D. 45°C
		A. 0.7 ppm
B. 1.5 ppm
C. 2 ppm
D. 3 ppm
		A. They were kept at the bottom layer of box
B. They were mixed with ripe apples
C. There were no ripe apples in the box
D. Less “hey”had been put in the box
		A. 2-4 micron
B. 1-4 micron
C. 0.5-2 micron
D. 40-70 micron
		A. AB, ab
B. Ab, ab
C. AB, Ab, aB, ab
D. Data insufficient
		A. Isomerases enzyme
B. Ligases enzyme
C. Lyases enzyme
D. Oxireductase enzyme