The canal system is a characteristic feature of:
1. echinoderms
2. helminths
3. coelenterates
4. sponges
Subtopic: Â Phylum Porifera |
 89%
Level 1: 80%+
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Subtopic: Â Phylum Porifera |
 78%
Level 2: 60%+
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Which type of cells are absent in sponges?
1. Trophocytes
2. Myocytes
3. Archaeocytes
4. Cnidocytes
Subtopic: Â Phylum Porifera |Â Phylum Coelenterata |
 75%
Level 2: 60%+
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Chondrichthyes is characterised by:
| 1. | placoid scale |
| 2. | ventral mouth |
| 3. | ctenoid scale and ventral mouth |
| 4. | placoid scale and ventral mouth |
Subtopic: Â Super Class Pisces & its General Characteristics |
 75%
Level 2: 60%+
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Ascaris is characterized by:
1.
absence of true coelom but the presence of metamerism
2.
presence of neither true coelom nor metamerism
3.
presence of true coelom but the absence of metamerism
4.
presence of true coelom and metamerism (metamerisation)
| 1. | absence of true coelom but the presence of metamerism |
| 2. | presence of neither true coelom nor metamerism |
| 3. | presence of true coelom but the absence of metamerism |
| 4. | presence of true coelom and metamerism (metamerisation) |
Subtopic: Â Phylum Aschelminthes |
 70%
Level 2: 60%+
AIPMT - 2008
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Subtopic: Â Phylum Mollusca |
 68%
Level 2: 60%+
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Which one of the following has an open circulatory system?
1. Pheretima
2. Periplaneta
3. Hirudinaria
4. Octopus
Subtopic: Â Phylum Arthropoda |
 59%
Level 3: 35%-60%
AIPMT - 2006
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Secondary body cavity with segmented mesodermal lining is called:
| 1. | haemocoel | 2. | neurocoele |
| 3. | true coelom | 4. | pseudocoelom |
Subtopic: Â Basis of Classification |
 58%
Level 3: 35%-60%
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The structure present in all adult vertebrates is:
| 1. | Notochord |
| 2. | Dorsal tubular nerve cord |
| 3. | Pharyngeal gill slits |
| 4. | All of the above |
Subtopic: Â Phylum Chordata |
Level 3: 35%-60%
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Subtopic: Â Phylum Porifera |
Level 4: Below 35%
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