A notochord, persistent throughout life and present from head to tail region is seen in:
1. Saccoglossus
2. Salpa
3. Branchiostoma
4. Petromyzon
Subtopic: Phylum Chordata |
74%
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Which class of vertebrates bears jaw but does not bear limbs?
| 1. | Cyclostomata | 2. | Chondrichthyes |
| 3. | Amphibia | 4. | Reptilia |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
72%
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Triploblastic, bilaterally symmetrical animals with true coelom but no segmentation are:
| 1. | Aschelminthes | 2. | Molluscs |
| 3. | Annelids | 4. | Chordates |
Subtopic: Phylum Mollusca |
81%
From NCERT
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Match each item in Column I with one in Column II and select the best match from the codes given:
Codes:
| Column I | Column II | ||
| A. | Comb plates | P. | Cnidaria |
| B. | Metagenesis | Q. | Mollusca |
| C. | Canal system | R. | Sponges |
| D. | Radula | S. | Ctenophora |
| A | B | C | D | |
| 1. | S | P | R | Q |
| 2. | P | S | R | Q |
| 3. | P | S | Q | R |
| 4. | S | P | Q | R |
Subtopic: Phylum Porifera | Phylum Coelenterata | Phylum Ctenophora | Phylum Mollusca |
89%
From NCERT
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The central nervous system in chordates is not:
| 1. | Single |
| 2. | Hollow |
| 3. | Ventral |
| 4. | Derived from embryonic ectoderm |
Subtopic: Phylum Chordata |
72%
From NCERT
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Animals with water vascular system:
| 1. | have a well developed excretory system |
| 2. | exhibit bilateral symmetry as adults |
| 3. | have an endoskeleton of calcareous ossicles |
| 4. | are all fresh water species |
Subtopic: Phylum Echinodermata |
77%
From NCERT
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A free-living organism with a dorso-ventrally flattened body and a very high regeneration capacity is:
1. Taenia solium
2. Fasciola hepatica
3. Planaria
4. Ascaris
1. Taenia solium
2. Fasciola hepatica
3. Planaria
4. Ascaris
Subtopic: Phylum Platyhelminthes |
89%
From NCERT
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What is the number of animals, amongst the animals given below, that have both a four-chambered heart and endothermy?
Crocodilus, Aptendytes, Canis, Calotes, Struthio, Delphinus, Testudo, Ichthyophis
| 1. | 3 | 2. | 4 |
| 3. | 5 | 4. | 6 |
Subtopic: Phylum Chordata | Study of Reptilia | Study of Aves & Mammals |
From NCERT
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Body not segmented but presence of three regions – a proboscis, a trunk, a collar and presence of a stomochord are the features seen in:
| 1. | Myxine | 2. | Ascidia |
| 3. | Saccoglossus | 4. | Branchiostoma |
Subtopic: Phylum Hemichordata |
85%
From NCERT
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes
| COLUMN I | COLUMN II | ||
| A. | Petromyzon | P | A jawless vertebrate |
| B. | Icthyophis | Q | A limbless amphibian |
| C. | Struthio | R | A flightless bird |
Codes
| A | B | C | |
| 1. | Q | R | P |
| 2. | Q | P | R |
| 3. | P | Q | R |
| 4. | P | R | Q |
Subtopic: Phylum Chordata | Comparative study of Cartilagenous & Bony Fishes | Study of Amphibians | Study of Aves & Mammals |
88%
From NCERT
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