Q. No.Which one of the following categories of animals, is correctly described with no single exception in it?
1.
All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal).
2.
All bony fishes have four pairs of gills and an operculum on each side.
3.
All sponges are marine and have collared cells.
4.
All mammals are viviparous and possess diaphragm for breathing.
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A marine cartilaginous fish that can produce electric current is:
| 1. | Pristis | 2. | Torpedo |
| 3. | Trygon | 4. | Scoliodon |
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The diagram given below shows the germs layer. The animals having structures shown in the figures A and B are respectively called
| 1. | Diploblastic, Triploblastic | 2. | Triploblastic, Diploblastic |
| 3. | Diploblastic, Diploblastic | 4. | Triploblastic, Triploblastic |
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In some Bilateria, the body is of many segments that show serial repetition of parts. Such segments are called as:
1. Myotomes
2. Metameres
3. Proglottides
4. Comb plates
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The phylum with exclusively marine animals is:
| 1. | Porifera | 2. | Cnidaria |
| 3. | Ctenophora | 4. | Platyhelminthes |
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Which of the following is not a feature of birds?
| 1. | Forelimbs modified into wings |
| 2. | Single occipital condyle |
| 3. | Ten pairs of cranial nerves |
| 4. | Four chambered heart |
Chordates are not characterized by:
| 1. | Ventral nerve cord | 2. | Post anal tail |
| 3. | Gill slits | 4. | A notochord |
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Notochord is derived from embryonic:
1. Ectoderm
2. Mesoderm
3. Endoderm
4. Ectoderm and Mesoderm
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Identify the phylum where the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches between ectoderm and endoderm :
1. Cnidaria
2. Platyhelminthes
3. Mollusca
4. Aschelminthes
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Sponges are mostly:
| 1. | Asymmetrical | 2. | Radially symmetrical |
| 3. | Bilateraly symmetrical | 4. | Biradially symmetrical |
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