Chapter 5: Respiration in Organisms

Q&A -Ask Doubts and Get Answers

Q
Respiration in Organisms

Question:

Mark ‘T’ if the statement is true and ‘F’ if it is false:

(i) During heavy exercise the breathing rate of a person slows down. (T/F)

(ii) Plants carry out photosynthesis only during the day and respiration only at night. (T/F)

(iii) Frogs breathe through their skins as well as their lungs. (T/F)

(iv) The fishes have lungs for respiration. (T/F)

(v) The size of the chest cavity increases during inhalation. (T/F)

Answer:

(i) During heavy exercise the breathing rate of a person slows down.  False (F)

Correct answer: During physical activity, we require more energy and we breathe faster. So, the breathing rate increases. 

(ii) Plants carry out photosynthesis only during the day and respiration only at night.  False (F)

Correct answer: Plants respire all day but photosynthesis takes place only during the day because plants need sunlight for preparing food.

(iii) Frogs breathe through their skins as well as their lungs. True (T)

(iv) The fishes have lungs for respiration.  False (F)

Correct answer: Fish does not have lungs for breathing. They breathe through a special organ called gills. 

(v) The size of the chest cavity increases during inhalation.  True (T)


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