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Diversity in Living Organisms — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceDiversity in Living Organisms5 Marks
Question
Distinguish between Nonchordata and Chordata.
✓

Answer

 
Nonchordates
Chordates
i.
Notochord is absent in them.
Notochord is present in them at some of their developmental stage.
ii.
Their central nervous system is solid and ventral.
Their central nervous system is hollow and dorsal.
iii.
Their circulatory system is of open or closed type.
Their circulatory system is of closed type.
iv.
Heart, if present in them, is dorsal in position.
Heart is always present and is ventral in position.

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