Advertisements
Advertisements
Question
How are cockroaches and rats harmful to humans?
Advertisements
Solution
Cockroaches and rats are common household pests.
(i) Cockroaches are involved in spoiling food, paper and cloth. They may act as carriers of viruses, especially those which cause cancer.
(ii) Rats eat grains and other foods. They also act as carriers of certain pathogens. A parasite named rat-fleas lives on rat's skin. It possibly carries the germs of plague.
APPEARS IN
RELATED QUESTIONS
No urination due to shortage of water in the body is a typical symptom of
Mention any three ways by which potable water can be contaminated.
Name the two common kinds of mosquitoes and the diseases they transmit.
Typhoid is caused by
Suggest any two methods of controlling flies.
The germ causing Hepatitis is transmitted through
Name the following:
Organisms that cause disease.
Explain the following:
Flies should not be allowed to sit on edible things.
Name the following:
Any disease caused by rats.
The question has four options. Choose the correct answer:
Mosquitoes larvae can be controlled by using:
