17 Amoebiasis is caused by 1. algae 2. fungi 3. micro arthopods 4. protozoans

16 ' Septicemia ' means 1. poisoning of body 2. poisoning of blood 3. poisoning of organs 4. poisoning of brain

15 Bacteria that is present in the intestine is useful in 1. excretion 2. digestion 3. absorption 4. assimilation

13 Pick out the ' odd man ' out 1. amoeba 2. spirogyra 3. euglena 4. vorticella

12 Which of the following is caused by bacteria? 1. AIDS 2. typhoid 3. amoebiasis 4. scabies

11 AIDS is caused by 1. TMV 2. Ebola 3. HIV 4. None

10 Important microorganisms that help in increasing soil fertility by decomposing biomass are 1. bacteria 2. algae 3. micro-arthopoda 4. virus