Class 5 EVS Chapter 8 HOTS Questions - A Treat for Mosquitoes

Q1: Anaemia is caused due to:
(a) Shortage of blood
(b) Shortage of bones
(c) Increase in the amount of blood
(d) None of the above
Ans: (a)
Anaemia is a condition in which is there is a shortage of blood or shortage of red blood cells. It results due to loss of blood. It can also result due to insufficient iron in the body to produce enough of haemoglobin.
Thus, the correct answer is option A.

Q2: Identify the symptoms of anaemia from the following?
(a) Fatigue
(b) Weakness
(c) Shortness of breathe
(d) All of the above
Ans: (d)
Anemia is a condition in which the blood doesn't have enough healthy red blood cells.
The major causes are iron deficiency (low-level iron) anemia and thalassemia (inherited disorders of hemoglobin).  
Symptoms of anemia: pale skin, fatigue, weakness, tiring easily, breathlessness, drop in blood pressure when standing from a sitting or lying position (orthostatic hypotension).
Hence, the correct answer is option D.

Q3: Which of the following is a source of iron?
(a) Green vegetables
(b) Amla
(c) Jaggery
(d) All of the above
Ans: (d)
Iron is an important component of haemoglobin. It carries oxygen from the lungs to different parts of the body. Sources of iron include sunflower seeds, nuts, beef, beans, green leafy vegetables, tofu, amla, jaggery.
Thus, the correct answer is option D.

Q4: The reduced flow of oxygen in blood occurs in
(a) Malaria
(b) Anaemia
(c) Cancer
(d) Typhoid
Ans: (b)
Anaemia is a decrease in the total amount of red blood cells (RBCs) or haemoglobin in the blood or a lowered ability of the blood to carry oxygen.
When anaemia comes on slowly, the symptoms may include feeling tired, weakness, shortness of breath or a poor ability to exercise. Hence, The reduced flow of oxygen in the blood occurs in Anaemia
 So, the correct answer is 'Anaemia'.

Q5: Green leafy vegetables are a rich source of ________.
(a) Sodium
(b) Iron
(c) Magnesium
(d) None of the above
Ans: (b)
Green leafy vegetables such as spinach are rich sources of iron. Other foods containing iron include sunflower seeds, nuts, beef, beans, tofu, amla, jaggery.
Thus, the correct answer is option B.

Q6: Anaemia is caused due to a shortage of which of the following component of blood?
(a) Haemoglobin
(b) Blood cells
(c) Plasma
(d) None of the above
Ans: (a)
Iron deficiency can lead to anaemia, that is a low number of haemoglobin in the blood as there is insufficient iron in the body to produce enough of haemoglobin.
Iron is an important component of haemoglobin which is present in red blood cells. It carries oxygen from the lungs to different parts of the body. Sources of iron include sunflower seeds, nuts, beef, beans, green leafy vegetables, tofu, amla, jaggery.
Thus, the correct answer is option A.

Q7: There is less iron in the blood of the person suffering from anaemia.
(a) True
(b) False
Ans: (a)
Anaemia is a decrease in the total amount of red blood cells (RBCs) or haemoglobin in the blood or a lowered ability of the blood to carry oxygen.
When anaemia comes on slowly, the symptoms may include feeling tired, weakness, shortness of breath or a poor ability to exercise. Hence, There is less iron in the blood of the person suffers from anaemia.
So, the correct answer is 'true'.

Q8: Anaemia is a common health problem especially in women. Which one of the following deficiencies is most frequently responsible for anaemia in India?
(a) Calcium
(b) Iron
(c) Iodine
(d) Zinc
Ans: (b)
Anemia is a decrease in the amount of red blood cells or hemoglobin in the blood which lowers the ability of the blood to carry oxygen. Iron deficiency is one of the major cause of this.
Therefore, the correct answer is option B.

Q9: Vegetables are good source of iron.
(a) True
(b) False
Ans: (a)
Vegetables are parts of plants that are consumed by humans or other animals as food. For example, spinach, leafy greens, such as spinach, kale, swiss chard, collard, and beet greens.
Hence, vegetables are a good source of iron is a true statement.

Q10: What was found out by the blood test?
Ans: It was found that I was suffering from anaemia.

Q11: Which of the following helps to cure anaemia?
(a)Jaggery
(b) Amla
(c) Green vegetables
(d) All of the above
Ans: (d)
Option (A): 

• Any of the food components which contain iron can reduce the chances of anaemia. 
• Jaggery prevents anaemia due to the presence of high iron content in it. This helps in the generation of red blood cells with haemoglobin. 

Option (B): 

• Amla is rich in Vitamin C, iron and multiple nutrients. The presence of iron can reduce the problems of iron deficiency leading to a state of anaemia. 

Option (C): 

• Green vegetables are rich in mineral content including iron and also highly fibrous. 
• So, green vegetables improve digestion of the nutrients in the stomach and also prevent anaemia.

Option (D): 

• Therefore, all of the given food materials are rich in iron components.
• This induces the production of haemoglobin and in turn, reduces the chances of anaemia. 

Hence, the correct answer is option (D).

Q12: We should not allow mosquitoes to breed in our surroundings because they:
(a) Multiply very fast and cause pollution
(b) Are vectors for many diseases
(c) Bite and cause skin diseases
(d) Are not important insects
Ans: (b)
Mosquitoes are vectors of diseases such as Malaria, Dengue, Encephalitis etc. They breed in stagnant water and therefore the surroundings should be kept clean, by filling pot holes, preventing accumulation of water etc
So, the correct answer is 'Are vectors for many diseases'