- 1(current)
Q. No.In which of the following animals, the body is cylindrical and is composed of an anterior proboscis, a collar and a long trunk?
| 1. | Hemichordates | 2. | Urochordates |
| 3. | Cephalochordates | 4. | Vertebrate chordates |
Subtopic: Â Phylum Hemichordata |
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Consider the given two statements:
| Statement 1: | Hemichordates were earlier considered as a sub-phylum under Phylum Chordata but are now placed separately in a phylum under non-Chordata. |
| Statement 2: | Hemichordates have a rudimentary structure in the collar region called stomochord, a structure homologous to the notochord. |
| 1. | Both Statement 1 and Statement 2 are correct but Statement 2 does not explain Statement 1. |
| 2. | Statement 1 is correct and Statement 2 is incorrect. |
| 3. | Both Statement 1 and Statement 2 are incorrect. |
| 4. | Both Statement 1 and Statement 2 are correct and Statement 2 explains Statement 1. |
Subtopic: Â Phylum Hemichordata |
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In hemichordates:
1. Circulatory system is a closed type
2. Proboscis gland is a digestive gland that secretes a large number of hydrolytic enzymes
3. Respiration takes place through the gills
4. Sexes are not separate, fertilization is internal and development is direct
1. Circulatory system is a closed type
2. Proboscis gland is a digestive gland that secretes a large number of hydrolytic enzymes
3. Respiration takes place through the gills
4. Sexes are not separate, fertilization is internal and development is direct
Subtopic: Â Phylum Hemichordata |
 64%
From NCERT
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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- 1(current)
Q. No.
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