| Sr NO. | Question | Answer |
|---|
| 61. | What would happen if a potted plant is over watered? |
Water will over flow and plant will end up dying from lack of oxygen for its roots. |
| 62. | What do the balloons in the model explained in the text represent? | Lungs. |
| 63. | What does the rubber sheet in the model explained in the text represent? | Diaphram |
| 64. | Cockroach breathe with using small openings on the sides of its body. These openings are called _____. | Spiracles. |
| 65. | Insects have a network of air tubes called _______ for gas exchange.
| Tracheae. |
| 66. | These air tubes or tracheae are found only in ______ and not in any other group of animals. | Insects. |
| 67. | Earthworms breathe through their _______. | Skins |
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