Which one of the following is one of the paths followed by air/O2 during respiration in an adult male Periplaneta americana as it enters the animal body?
1.
Spiracle in metathorax, trachea, tracheoles, oxygen diffuses into cells
2.
Mouth, bronchial tube, trachea, oxygen enters cells
3.
Spiracles in prothorax, tracheoles, and trachea oxygen diffuses into cells
4.
Hypopharynx, mouth, pharynx, trachea, tissues
Subtopic: Â Cockroach: Respiratory System |
 64%
From NCERT
NEET - 2013
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Regarding frogs:
Statement I: They have the ability to change the colour to hide them from their enemies (camouflage).
Statement II: They undergo summer sleep called as hibernation as well as winter sleep called as aestivation.
1. Only Statement II is correct
2. Only Statement I is correct
3. Both Statement I and Statement II are incorrect.
4. Both Statement I and Statement II are correct.
Statement I: They have the ability to change the colour to hide them from their enemies (camouflage).
Statement II: They undergo summer sleep called as hibernation as well as winter sleep called as aestivation.
1. Only Statement II is correct
2. Only Statement I is correct
3. Both Statement I and Statement II are incorrect.
4. Both Statement I and Statement II are correct.
Subtopic: Â Frogs |
 76%
From NCERT
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Identify the incorrect statement regarding Rana tigrina:
1. Forebrain includes olfactory lobes.
2. Midbrain includes optic lobes.
3. Hindbrain consists of cerebellum and medulla oblongata.
4. There are twelve pairs of cranial nerves.
1. Forebrain includes olfactory lobes.
2. Midbrain includes optic lobes.
3. Hindbrain consists of cerebellum and medulla oblongata.
4. There are twelve pairs of cranial nerves.
Subtopic: Â Frogs: Anatomy (Nervous System) |
 81%
From NCERT
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Assertion (A): The biceps and triceps are antagonistic in nature.
Reason (R): Biceps flexes the arm whereas triceps straightens it.
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): Biceps flexes the arm whereas triceps straightens it.
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 Animal Tissue: Muscle Types & Skeletal Muscles |
 74%
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Assertion (A): Bone possess a very hard matrix but cartilage has pliable matrix.
Reason (R): Bone matric contain calcium salts but cartilage contain chondroitin salts.
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): Bone matric contain calcium salts but cartilage contain chondroitin salts.
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 Connective Tissue |
 79%
From NCERT
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Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
In light of the above statement, choose the most appropriate answer from the options given below:
| Assertion (A): | Connective tissues link and support other tissues of the body. |
| Reason (R): | The name of the connective tissue is after its functions. |
In light of the above statement, choose the most appropriate answer from the options given below:
| 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. | (A) is False but (R) is True. |
Subtopic: Â Connective Tissue |
From NCERT
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Assertion (A): Earthworms make the soil porous and increase the fertility of the soil.
Reason (R): They are known as friends of farmers.
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. (A) is false, but (R) is true.
Reason (R): They are known as friends of farmers.
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. (A) is false, but (R) is true.
Subtopic: Â Earthworm |
 57%
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Assertion (A): Frogs have smaller alimentary canal.
Reason (R): They are carnivores.
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. (A) is false, but (R) is true.
Reason (R): They are carnivores.
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. (A) is false, but (R) is true.
Subtopic: Â Frogs: Anatomy (Digestive System) |
 87%
From NCERT
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Assertion (A): Frogs have a short alimentary canal.
Reason (R): They are carnivores.
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. (A) is false, but (R) is true.
Reason (R): They are carnivores.
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. (A) is false, but (R) is true.
Subtopic: Â Frogs |
 88%
From NCERT
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| Assertion (A): | In frogs, external fertilization takes place. |
| Reason (R): | Frog is an aquatic amphibian. |
| 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 Frogs |Â Frogs: Anatomy (Male Reproductive System) |
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