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Q. No.
Assertion (A):
Choanocytes or collar cells line the spongocoel and the canals in poriferans.
Reason (R):
Poriferans possess spicules and spongin fibres.
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: Phylum Porifera |
82%
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| Assertion (A): | All vertebrates are chordates but all the chordates are not vertebrates. |
| Reason (R): | All the vertebrates are characterised by the presence of a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits at some stages of the life cycle. |
| 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: General Introduction: Vertebrates & Agnatha |
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Choose the correct statement
| 1. | Metamerism first developed in Arthropoda |
| 2. | Triploblastic animals lacking coelom are platyhelminths and annelids |
| 3. | Coelomate animals in which blastopore forms anus are grouped under deuterostomes |
| 4. | Coelom is the body cavity found between ectoderm and outer body wall |
Subtopic: Phylum Arthropoda |
66%
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Read the following statements:
i. Longitudinal and circular muscles exist
ii. Body wall remains covered by the glandular epidermis
iii. Metamerism present
iv. Closed blood vascular system
The above statements exemplify which organism?
1. Flatworm
2. Ophiura
3. Wuchereria
4. Earthworm
i. Longitudinal and circular muscles exist
ii. Body wall remains covered by the glandular epidermis
iii. Metamerism present
iv. Closed blood vascular system
The above statements exemplify which organism?
1. Flatworm
2. Ophiura
3. Wuchereria
4. Earthworm
Subtopic: Phylum Annelida |
86%
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Which of the following is correct?
| 1. | Archaeopteryx is thought to be the transitional fossil between dinosaurs and birds since, like birds Archaeopteryx had feathers and a fused collar-bone indicating the flying ability |
| 2. | Cloaca is present in Balenoptera |
| 3. | In Physalia, digestion is first extracellular and then intracellular digestion occurs |
| 4. | Both (1) and (3) |
Subtopic: Study of Aves & Mammals |
80%
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Choose the correct match:
| 1. | Branchostoma : Notochord persist through out the life |
| 2. | Ascidia : Notochord present in larva and disappears in adult |
| 3. | Doliolum : Notochord present in the larval tail only |
| 4. | More than one option is correct |
Subtopic: Phylum Hemichordata | General Introduction: Vertebrates & Agnatha | Class Cyclostomata |
82%
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Lampreys:
| 1. | May or may not possess jaw |
| 2. | Is included in the division Agnatha where notochord is present only in the early stages |
| 3. | Possess an elongated body with gill slits for respiration |
| 4. | Are devoid of scales and possess paired fins |
Subtopic: General Introduction: Vertebrates & Agnatha | Class Cyclostomata |
51%
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What is/are the advantage(s) of coelom?
1. Can absorb shock or provide a hydrostatic skeletal system
2. Less freedom for movement
3. Allows organ to expand
4. Both (1) and (3)
1. Can absorb shock or provide a hydrostatic skeletal system
2. Less freedom for movement
3. Allows organ to expand
4. Both (1) and (3)
Subtopic: Basis of Classification:I | Basis of Classification:II | Basis of Classification |
89%
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Read the following statements:
How many of the above statements are incorrect?
1. One
2. Three
3. Two
4. Four
| i. | Snakes lack urinary bladder |
| ii. | Air sacs in birds are helpful to lessen the body weight, keep the body warm, regulate body temperature and help in blood circulation |
| iii. | Bone marrow is abundantly present in birds |
| iv. | Devil fish belongs to the phylum Mollusca |
| v. | Sea urchin has mouth on lower side and anus on the upper side |
How many of the above statements are incorrect?
1. One
2. Three
3. Two
4. Four
Subtopic: Phylum Arthropoda | Study of Aves & Mammals |
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Which of the following groups of three animals, each is correctly matched with their one characteristic morphological feature:
| Animals | Morphological features | |
| (a) | Scorpion, spider, cockroach | Ventral solid nerve cord |
| (b) | Centipede, prawn, sea-urchin | Joined appendages |
| (c) | Cockroach, Locust, Taenia | Metameric segmentation |
| (d) | Liver fluke, sea-anemone, sea-cucmber | Bilateral symmetry |
Subtopic: Phylum Arthropoda | Phylum Mollusca | Phylum Echinodermata |
66%
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