Assertion (A): | The phylum Aschelminthes represent pseudocoelomates |
Reason (R): | In Aschelminthes, mesoderm is present as scattered pouches in between ectoderm and endoderm |
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. |
Assertion (A): | Respiration occurs through the general body surface in Cephalochordates. |
Reason (R): | Digestive tract is incomplete in Cephalochordates. |
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. |
Assertion (A) : | Birds possess moist skin. |
Reason (R) : | Birds possess oil glands throughout their body. |
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. |
Assertion (A) : | The scales of reptiles and fishes are similar in origin. |
Reason (R) : | All the chordates lack kidneys. |
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. |
Assertion (A): | All birds, except the ones like koel (cuckoo), build nests for retiring and taking rest during night time. |
Reason (R): | Koel lays its eggs in the nests of tailor bird. |
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. |
Assertion (A): | Bats and whales are classified as mammals. |
Reason (R): | Bats and whales have four-chambered heart. |
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. |
Assertion (A): | The duck-billed platypus and the spiny ant-eater, both are egg laying animals yet they are grouped under mammals. |
Reason (R): | Both of them have seven cervical vertebrae and 12 pairs of cranial nerves. |
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. |
Assertion (A) : | In Mollusca, feathers like gills are present in the mantle cavity. |
Reason (R) : | These gills have respiratory and excretory functions. |