Animals can be categorised on the basis of their symmetry. Which of the following statements are correct?
I:
Sponges are mostly asymmetrical.
II:
Coelenterates, ctenophores and adult echinoderms have radial symmetry.
III:
Annelids and arthropods exhibit bilateral symmetry.
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Â Phylum Porifera |Â Phylum Coelenterata |Â Phylum Ctenophora |Â Phylum Annelida |Â Phylum Arthropoda |Â Basis of Classification |
 90%
Level 1: 80%+
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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. | Cnidaria | P. | Metamerism |
| B. | Mollusca | Q. | Tube feet |
| C. | Annelida | R. | Metagenesis |
| D. | Echinodermata | S. | Radula |
| A | B | C | D | |
| 1. | R | Q | P | S |
| 2. | P | Q | R | S |
| 3. | R | S | P | Q |
| 4. | P | S | R | Q |
Subtopic: Â Phylum Coelenterata |Â Phylum Annelida |Â Phylum Mollusca |Â Phylum Echinodermata |
 88%
Level 1: 80%+
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Consider the two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | An undifferentiated layer, mesoglea, is present in between the ectoderm and the mesoderm in diploblastic organisms. |
| Statement II: | A third germinal layer, endoderm, in between the ectoderm and mesoderm, is present in triploblastic animals. |
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Â Basis of Classification |
 55%
Level 3: 35%-60%
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Choanocyte is a collared flagellated cell found in sponges. The collar of this cell is made of:
| 1. | microvilli | 2. | fibrils |
| 3. | tentacles | 4. | canals |
Subtopic: Â Phylum Porifera |
Level 4: Below 35%
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The body is unsegmented but with a distinct head, muscular foot and visceral hump in:
1. Hemichordates
2. Urochordates
3. Molluscs
4. Cephalochordates
1. Hemichordates
2. Urochordates
3. Molluscs
4. Cephalochordates
Subtopic: Â Phylum Annelida |
 94%
Level 1: 80%+
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Parapodia are found in:
1. aquatic molluscs, and help in respiration.
2. benthic echinoderms, and help in gathering food.
3. Ctenophores, and help in locomotion.
4. aquatic annelids, and help in swimming.
1. aquatic molluscs, and help in respiration.
2. benthic echinoderms, and help in gathering food.
3. Ctenophores, and help in locomotion.
4. aquatic annelids, and help in swimming.
Subtopic: Â Phylum Annelida |
 90%
Level 1: 80%+
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Over two-thirds of all named species on earth are:
1. Molluscs
2. Arthropods
3. Chordates
4. Sponges
1. Molluscs
2. Arthropods
3. Chordates
4. Sponges
Subtopic: Â Phylum Arthropoda |
 95%
Level 1: 80%+
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All the following are correct for amphibians except:
| 1. | Skin is moist and without scales. |
| 2. | A tympanum represents the ear. |
| 3. | Eyes lack eyelids. |
| 4. | Heart is three chambered. |
Subtopic: Â Study of Amphibians |
 80%
Level 1: 80%+
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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 | Limulus | P | Gregarious pest |
| B | Locusta | Q | Living fossil |
| C | Ancylostoma | R | Filaria worm |
| D | Wuchereria | S | Hookworm |
| A | B | C | D | |
| 1. | Q | P | S | R |
| 2. | P | Q | S | R |
| 3. | P | Q | R | S |
| 4. | Q | P | R | S |
Subtopic: Â Phylum Aschelminthes |Â Phylum Arthropoda |
 89%
Level 1: 80%+
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The cell shown in the given figure defines animals belonging to:
1. Porifera
2. Cnidaria
3. Platyhelminthes
4. Urochordates
1. Porifera
2. Cnidaria
3. Platyhelminthes
4. Urochordates
Subtopic: Â Phylum Coelenterata |
 95%
Level 1: 80%+
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