At level above _____ , sound turns into harmful noise pollution?

Related Mcqs:

1. Which Of The Following Produces Harmful Gases_________?

   A. Plants
   B. Motor Vehicles
   C. Bacteria
   D. None of these

   Submitted by: Rafi Umar

2. “lubb” sound is produced due to___________________?

   A. Opening of inlet valve
   B. Closure of inlet valve
   C. Opening of outlet valve
   D. Closure of outlet valve

3. “lub” sound is produced after _________ ?

   A. The ventricles are fully contracted
   B. The ventricles start to relax
   C. The bicuspid and tricuspid valves suddenly close
   D. The semilunar valves are closed

   Submitted by: Rashid Mehmood

4. Chlorophyll is a/an _____ molecule?

   A. Inorganic
   B. Cationic
   C. Anionic
   D. Organic

5. The liquid that escapes during defrosting frozen meat contains _____ bacteria?

   A. Campylobacter
   B. Nitrobacter
   C. Azobacter
   D. Salmonella

6. Anus is surrounded by _____ types of muscles?

   A. 2
   B. 3
   C. 1
   D. 4

7. Hunger contractions are _____ contractions?

   A. Antiperistalsis
   B. Peristalsis
   C. Voluntary
   D. None of these

8. Approximately _____ species of bacteria are known to cause diseases in humans.

   A. 100
   B. 200
   C. 300
   D. 400

9. With different chemical arrangements and formation Of complex molecules, the life emerges on the level of the ?

   A. Cells
   B. Tissues
   C. Organs
   D. Organ System

10. Low level of CO2 favours _________ of the stomata.

    A. Opening
    B. Closure
    C. Both of these
    D. None of these