Question

2. Suggest a suitable word for each of the following statements.
(a) Chemicals added to food to prevent growth of microorganisms.
(b) Nitrogen-fixing microorganism present in the root nodules of legumes.
(c) Agent which spreads pathogens from one place to another.
(d) Chemicals which kill or stop the growth of pathogens.
(e) The nutrient is enriched by blue-green algae (cyanobacteria) in the soil.
(f) Disease causing microorganisms.
(g) Substance produced by the body's immune system when it detects harmful substances.
(h) A product that stimulates a person's immune system to produce immunity to a specific
disease, protecting the person from that disease
(i)Bacteria that helps form curd.
(j) Microbial diseases that can spread from an infected person to a healthy person through
air, water, food or physical contact.

Answer 1

1. Preservatives (Sodium benzoate and sodium meta bisulfate)
2. Rhizobia bacteria
3. Carrier/Vector
4. Nitrogen fixing blue green algae or cyanobacteria
5. Antibiotics are chemicals that kill or inhibit the growth of pathogens
6. Infectious diseases are caused by types of bacteria, viruses, parasites, and fungi around us..(pathogens)
7. An antibody is a protein produced by the body's immune system
8. Vaccine
9. Lactobacillus
10. ( HIV), (hepatitis A), (influenza)
11. (Norovirus), (salmonella, E. coli), (HIV, hepatitis B) ;(botulism)