- 1(current)
Q. No.Assertion (A): Special vascularised structures called gills are used by most of the aquatic arthropods and molluscs.
Reason (R): Terrestrial arthropods also possess gills.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Terrestrial arthropods also possess gills.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Â Respiratory Organs |
 71%
Level 2: 60%+
Hints
| Assertion (A): | The tracheae, primary, secondary and tertiary bronchi and initial bronchioles are supported by incomplete cartilaginous rings. |
| Reason (R): | The cartilaginous rings prevent these structure from collapsing. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |Â Respiratory Organs |
 82%
Level 1: 80%+
Hints
Read the following statements and choose the correct option:
A. All the terrestrial vertebrates are air-breathers.
B. They have developed lungs for breathing, an adaption for land life.
1. Statement A is correct and B is incorrect
2. Statement A is incorrect and B is correct
3. Both the statements are correct
4. Both the statements are incorrect
A. All the terrestrial vertebrates are air-breathers.
B. They have developed lungs for breathing, an adaption for land life.
1. Statement A is correct and B is incorrect
2. Statement A is incorrect and B is correct
3. Both the statements are correct
4. Both the statements are incorrect
Subtopic: Â Respiratory Organs |
 78%
Level 2: 60%+
Hints
- 1(current)
Q. No.
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