Question

Assertion : Periplaneta americana is nocturnal, omnivorous, household pest.
Reason : It is because it acts as scavenger.

• A. A is true but R is false
• B. A is false but R is true
• C. Both A and R are true and R is correct explanation of A
• D. Both A and R are true but R is not correct explanation of A

Answer 1

Answer: (D)

Cockroaches are found in places where there is warmth, dampness and plenty of organic food to devour. Indoors, they are a common pest in kitchens, latrines, hotels, restaurants, godowns, storerooms, board ships, etc. Cockroaches are nocturnal creatures. During daytime, they remain inactive and hiding. During night, they show much activity and run here and there in search of food. Being omnivorous and scavengerous in diet, they devour any animal or vegetable substance and even non-living materials like leather, paper, cloth, etc., causing great loss.