(B) Low temperature(D) High temperature(A) Humidity(C) Rainfall67. Which of the following tools is used by 67the farmer to remove weeds from thefield?(A) Hoe(C) Axe(B) Plough(D) Cultivator68. Pathogenic micro-organisms present in 6host cells are killed bymedicines.(A) antibiotics (B) antibodies(C) pain killer (D) vaccinesPenicillin was discovered by:(A) Louis Pasteur (B) Robert Koch(C) Alexander (D) Edward Jenner69.Fleming70. Polycot is obtained by mixing(A) nylon and wool(B) polyester and wool(C) nylon and cotton(D) polyester and cotton

(B) Low temperature(D) High temperature(A) Humidity(C) Rainfall67. Whi

1.	(B) Low temperature(D) High temperature(A) Humidity(C) Rainfall67. Which of the following tools is used by 67the farmer to remove weeds from thefield?(A) Hoe(C) Axe(B) Plough(D) Cultivator68. Pathogenic micro-organisms present in 6host cells are killed bymedicines.(A) antibiotics (B) antibodies(C) pain killer (D) vaccinesPenicillin was discovered by:(A) Louis Pasteur (B) Robert Koch(C) Alexander (D) Edward Jenner69.Fleming70. Polycot is obtained by mixing(A) nylon and wool(B) polyester and wool(C) nylon and cotton(D) polyester and cotton
Answer» Shearing of the wool Is done with special instruments called