Which one of the following has an open circulatory system?
1. Pheretima
2. Periplaneta
3. Hirudinaria
4. Octopus

Subtopic:  Phylum Arthropoda |
 59%
From NCERT
AIPMT - 2006
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Which type of cells are absent in sponges?

1. Trophocytes

2. Myocytes

3. Archaeocytes

4. Cnidocytes

Subtopic:  Phylum Porifera | Phylum Coelenterata |
 74%
From NCERT
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Food storage in Leucosolenia occur by:

1. ostia

2. osculum

3. thesocytes

4. spongocoel

Subtopic:  Phylum Porifera |
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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:  Phylum Chordata |
From NCERT
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Which one of the following is not a vertebrate?

1. Sea cow

2. Sea lion

3. Sea horse

4. Sea hare

Subtopic:  Phylum Mollusca |
 68%
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The canal system is a characteristic feature of:

1. echinoderms

2. helminths

3. coelenterates

4. sponges

Subtopic:  Phylum Porifera |
 88%
From NCERT
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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:  Super Class Pisces & its General Characteristics |
 74%
From NCERT
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Secondary body cavity with segmented mesodermal lining is called:

1. haemocoel

2. neurocoele

3. true coelom

4. pseudocoelom

Subtopic:  Basis of Classification |
 57%
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One animal that does not perform locomotion is:

1. Sycon

2. Nereis

3. Sepia

4. Euglena

Subtopic:  Phylum Porifera |
 78%
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Notochord originates from:
1. Mesoderm
2. Ectoderm
3. Endoderm
4. None of these
Subtopic:  Phylum Chordata |
 76%
From NCERT
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