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Given below are two statements:
Assertion (A):
Echinoderms are spiny-bodied animals.
Reason (R):
Their exoskeleton is made up of calcareous ossicles.
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 Echinodermata |
Level 3: 35%-60%
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Consider the given two statements.
| Assertion (A): | Annelids have segments or metameres which are distinctly marked out. |
| Reason (R): | The word Annelida is derived from the Latin word annulus which means little rings. |
| 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: Phylum Annelida |
53%
Level 3: 35%-60%
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Assertion (A): Aschelminthes are called roundworms.
Reason (R): Aschelminthes have circular bodies in cross-section.
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): Aschelminthes have circular bodies in cross-section.
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: Phylum Aschelminthes |
91%
Level 1: 80%+
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Assertion (A): Platyhelminthes are also known as Flatworms.
Reason (R): Platyhelminthes have a dorsolaterally flattened 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. (A) is false, but (R) is true.
Reason (R): Platyhelminthes have a dorsolaterally flattened 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. (A) is false, but (R) is true.
Subtopic: Phylum Platyhelminthes |
Level 3: 35%-60%
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Assertion (A): The digestive system of Aschelminthes is incomplete.
Reason (R): The incomplete digestive system has only a single opening to the outside of the body that serves as both mouth and anus.
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): The incomplete digestive system has only a single opening to the outside of the body that serves as both mouth and anus.
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: Phylum Aschelminthes |
73%
Level 2: 60%+
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Assertion (A): Coelenterates have a tissue level of organization.
Reason (R): Cells performing the same function are arranged in tissues.
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): Cells performing the same function are arranged in tissues.
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: Phylum Coelenterata |
73%
Level 2: 60%+
Hints
Read the following statements for the first triploblastic animals (w.r.t. evolution)
i. Possess coelom
ii. Are acoelomate
iii Are pseudocoelomate
iv. Possess protonephridia
v. Cephalisation begins
vi. Is exemplified by Planaria
Which of the following statements corresponds to these animals?
1. i, ii, iii
2. i, ii, iii, iv, v, vi
3. ii, iv, v, vi
4. i and iii
i. Possess coelom
ii. Are acoelomate
iii Are pseudocoelomate
iv. Possess protonephridia
v. Cephalisation begins
vi. Is exemplified by Planaria
Which of the following statements corresponds to these animals?
1. i, ii, iii
2. i, ii, iii, iv, v, vi
3. ii, iv, v, vi
4. i and iii
Subtopic: Basis of Classification:I | Basis of Classification:II | Basis of Classification |
80%
Level 1: 80%+
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Column-I contain larval stages and column-II contain the groups to which they belong. Match them correctly and choose the right option"
1. A = vi, B = iv, C = i, D = v, E = ii
2. A = ii, B = v, C = i, D = iv, E = vi
3. A = v, B = iv, C = iii, D = ii, E = i
4. A = iv, B = iii, C = ii, D = i, E = v
| Column-I | Column-II | ||
| A. | Planula | i. | Annelida |
| B. | Tornaria | II. | Mollusca |
| C. | Trochophore | iii. | Arthropoda |
| D. | Bipinnaria | iv. | Hemichordata |
| E. | Glochidium | v. | Echinodermata |
| vi. | Coelenterata |
2. A = ii, B = v, C = i, D = iv, E = vi
3. A = v, B = iv, C = iii, D = ii, E = i
4. A = iv, B = iii, C = ii, D = i, E = v
Subtopic: Phylum Annelida | Phylum Arthropoda | Phylum Mollusca | Phylum Echinodermata | Phylum Hemichordata | Phylum Chordata |
Level 3: 35%-60%
Hints
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 |
68%
Level 2: 60%+
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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 |
Level 3: 35%-60%
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