1.multiply very fast and cause pollution
2.are vectors for many diseases
3.bite and cause skin diseases
4.are not important insects
Answer:2
1.sexual contact
2.hugs
3.breast feeding
4.blood transfusion
Answer 21.High blood pressure is caused by excessive weight and lack of exercise.
2.Cancers can be caused by genetic abnormalities.
3.Peptic ulcers are caused by eating acidic food.
4.Acne in not caused by staphylococci.
Answer 31.Cancer
2.AIDS
3.Air borne diseases
4.Cholera
Answer 31.viruses make use of host machinery
2. viruses are on the border line of living and non-living
3.viruses have very few biochemical mechanisms of their own
4.viruses have a protein coat
Answer 31.animals carry the infecting agents from sick person to another healthy person
2.microorganisms which cause many diseases
3.infected person
4.diseased plants
Answer 11.air
2.water
3.food
4.personal contact
Answer 21.multiply very fast and cause pollution
2.are vectors for many diseases
3.bite and cause skin diseases
4.are not important insects
Answer 21.Dengue
2.Malaria
3.Brain fever or encephalitis
4.Pneumonia
Answer 41.Ascaris
2.Trypanosoma
3.Leishmania
4.Bacteria
Answer 31.Typhoid
2.Anthrax
3.Tuberculosis
4.Malaria
Answer 41.Brain fever
2.Malaria
3.Typhoid
4.Dengue
Answer 31.Malaria
2.Influenza
3.AIDS
4.Cholera
Answer 11.Common cold
2.Chicken pox
3.Chewing tobacco
4.Stress
Answer 31.Cholera
2.Tuberculosis
3.Anthrax
4.Influenza
Answer 41.Dengue
2.AIDS
3.Typhoid
4.Influenza
Answer 31.Living in clean space
2.Good economic condition
3.Social equality and harmony
4.Living in a large and well furnished house
Answer 41.High blood pressure
2.Genetic abnormalities
3.Sneezing
4.Blood cancer
Answer 31.vaccination kills the polio causing microorganisms
2.prevents the entry of polio causing organism
3.it creates immunity in the body
4.all the above
Answer 3