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)

Subtopic:  Phylum Aschelminthes |
 71%
AIPMT - 2008
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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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