Question
Give three major differences between chordates and non-chordates and draw a schematic sketch of a chordate showing those features.
✓
Answer
The major differences between Chordates and Non-chordates are as follows:
Schematic sketch illustrating important characters of chordates is shown below: 
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Chordates
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Non-Chordates
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1.
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A notochord is present at some stage in the life cycle of a chordate.
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Notochord is not present at any stage in the Life cycle of a non-chordate.
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2.
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Gill-slits are present in the pharynx either in embryo or in adult organism.
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Pharyngeal gill slits are absent.
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3.
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Tail is present at some stage in the life of the chordate.
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Tail is absent in non-chordates.
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4.
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Heart is ventrally located.
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Heart (if present) is dorsally located,
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5.
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Central nervous system is dorsal and hollow in chordates.
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Central nervous system in non-chordates is solid and ventrally located.
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