Q1. Fill in the blanks.
i. Microorganisms can be seen with the help of a ____________.
ii. Blue green algae fix ___________directly from air to enhance fertility of soil.
iii. Alcohol is produced with the help of __________.
iv. Cholera is caused by ____________.
v. Carrier of malaria-causing protozoan is ______________________.
vi. The bread or idli dough rises because of_______________________.
i. Housefly is the common carrier of communicable diseases. _______
ii. Amoeba lives in colonies. _________
iii. Bacteria are also involved in the making of cheese, pickles and many other food items. ________
iv. Polio drops given to children are actually a vaccine. ________
Q3. What causes malaria?
Q4. Which mosquito act as carrier of dengue virus?
Q5. Name any two diseases that can be prevented by vaccination.
Q6. Give two examples of algae.
Q7. Give two examples of protozoa.
Q8. How are cholera and typhoid caused?
Q9. Give few of examples of fungi.
Q10. Who discovered penicillin?
Q11. Name any two diseases caused by bacteria.
Q12. What causes foot and mouth disease of cattle?
Q13. Who discovered the vaccine for smallpox?
Q14. Name any two diseases caused by protozoa.
Q15. Name some antibiotics.
Q16. How are meat and fish preserved?
Q17. What is fermentation?
Q18. Why do we boil milk before storing?
Q19. Name one plant disease caused by bacteria and its mode of transmission.
Q20. Why are the antibiotics not effective against colds and the flu?
Q21. Name one plant disease caused by virus and its mode of transmission.
Q22. How can we control plant diseases?
Q23. Name one plant disease caused by fungi and its mode of transmission.