class 8 science chapter 2 mcq

12 When a vaccine is given, that contains 1. weak micro organisms 2. killed micro organisms 3. 1 and 2 4. living micro organisms

11 This protect us from getting the diseases over a long period of time 1. antibiotic 2. injection 3. vaccine 4. tablets

10 'Pencillin' antibiotic is discovered by 1. yellapraggada subba rao 2. alexandar flemming 3. louis pasteur 4. edwaard jenner

09 Pencillium notatum is a 1. bacteria 2. virus 3. fungi 4. algae