Vector

Q.

(a) How do mosquitoes carry disease-causing micro-organisms and spread diseases?

(b) Mention any three ways of preventing diseases spread by mosquitoes.

Q.

The mosquito P is a carrier of virus and spreads a disease Q. Another mosquito R is the carrier of protozoan S and spreads a disease called T.

(a) Name (i) mosquito P, and (ii) disease Q,

(b) Name (i) mosquito R, (ii) protozoan S, and (iii) diseases T.

(c) What is the sex of mosquito P ?

(d) What is the sex of mosquito R ?

Q.

Which disease is spread by :

(a) female Anopheles mosquito ?

(b) female Aedes mosquito ?

Q.

(a) How do houseflies carry disease-causing microbes (or pathogens)?

(b) State any two ways of preventing disease spread by houseflies.

Q.

The malarial parasite Plasmodium divides into many daughter cells in our body through:

__

Q.

The most common carrier of communicable diseases in :

(a) ant (b) housefly (c) dragonfly (d) spider

Q.

Name two diseases spread by mosquitotes.

Q. Which of the following disease is transmitted through contaminated food and water?

1. 
   Malaria
2. 
   Cholera
3. 
   Polio
4. 
   Chickenpox

Q.

Question 2 (d)
The most common carriers of communicable diseases is

a) ant
b) housefly
c) dragonfly
d) spider

Q. The mosquito P is a carrier of virus and spreads a disease Q. ​

Another mosquito R is the carrier of protozoan S and spreads a disease called T.​

What is the sex of mosquito R?

Q. What are communicable diseases ? <!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> [Review Questions - Pg No.81 - SAQ - 1(b)]

Q.

In order to take precautionary steps to control dengue, we must take measures to stop the breeding of:

1. Anopheles mosquito
2. Fleas
3. Aedes mosquito
4. Fire ants

Q. Which of the following diseases is/are spread by a vector?

1. Dengue
2. Malaria
3. Cholera
4. Typhoid

Q.

All diseases are spread when someone comes in contact with a sick person.

1. True

2. False

Q. Arrange the steps involved in the spread of malaria in the correct sequence.

1. Mosquito bites
2. Pathogen enters
3. Infects liver
4. Symptoms appear

Q.

Which of the two spreads dengue : mosquito or housefly ?

Q. Common cold is caused by .

1. Bacteria
2. Virus
3. Protozoa
4. Fungi

Q. The parasite called Plasmodium causes a disease known as :​

1. dengue​
2. malaria​
3. measles ​
4. polio

Q. What are vector-borne diseases? Explain the role of vector in disease transmission with an example.

Q. Which among the following could be a vector?

1. Rat
2. Mosquito
3. Contaminated food
4. Bacteria

Q.

Which of the following disease is spread through an infected rat?

1. Hepatitis

2. Dengue

3. Plague

4. Common cold

Q. Discuss the different ways in which communicable diseases spread from person to person.

Q. The parasite called Plasmodium causes a disease known as :​

1. polio
2. measles ​
3. malaria​
4. dengue​

Q. Which of the following disease is transmitted through contaminated food and water?

1. 
   Malaria
2. 
   Cholera
3. 
   Polio
4. 
   Chickenpox

Q.

Fill in the blanks.

Organisms which carry specific germs are called _________.

Q. Cochineal insects have proved very useful for control of

1. Cannabis
2. Parthenium
3. Opuntia
4. Eicchornia

Q.

Question 18
Vectors can be defined as

(a) animals carry the infecting agents from sick person to another healthy person
(b) microorganisms which cause many diseases
(c) infected person
(d) diseased plants

Q. The causative agent for common cold is _____________.

1. Retrovirus
2. Rhinovirus
3. Adenovirus
4. Corona virus

Q. What are vector-borne diseases? Explain the role of vector in disease transmission with an example.

Q.

What are vectors?