Question 11 MarkExhaled air has more percentage of $CO _2$ than inhaled air.AnswertrueView full question & answer→
Question 21 MarkOxygen breaks down glucose outside the cells of organisms.Answerfalse, oxygen breaks down glucose inside the cells of organisms.View full question & answer→
Question 31 MarkInsects have spiracles on the lower surface of their body.Answerfalse, insects have spiracles on the sides of their body.View full question & answer→
Question 51 MarkAll living organisms respire to get energy from glucose/food.AnswertrueView full question & answer→
Question 61 MarkThe size of the chest cavity increases during inhalation.AnswertrueView full question & answer→
Question 71 MarkThe fishes have lungs for respiration.Answerfalse. Fishes breathe through their gills.View full question & answer→
Question 81 MarkFrogs breath through their skins as well as their lungs.AnswertrueView full question & answer→
Question 91 MarkPlants carry out photosynthesis only during the day and respiration only at night.Answerfalse. Photosynthesis occurs in the presence of sunlight, i.e. during the day. Respiration is a continuous process and it occurs all the time (day and night). View full question & answer→
Question 101 MarkDuring heavy exercise the breathing rate of a person slows down.Answerfalse. During heavy exercise, the breathing rate of a person increases. View full question & answer→
Question 111 MarkThe balance between $CO _2$ and $O _2$ is maintained by the plants.AnswertrueView full question & answer→
Question 121 MarkThe exchange of gases in plants takes place through stomata.AnswertrueView full question & answer→
Question 131 MarkWe take deep breaths after we hold on breath for the one minute.AnswertrueView full question & answer→