Give three major differences between chordates and non-chordates and draw a schematic sketch of a chordate showing those features.
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			 Chordates  | 
			
			 Non-Chordates  | 
		
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			 They have a notochord Their tail is present at some stage in life Their heart is ventral Their CNS is dorsal Gill slits are present in the pharynx  | 
			
			 They do not have a notochord Their tail is entirely absent Their heart is dorsal CNS is central, solid, and double Gill slits are absent  | 
		
 The sketch of a chordate showing features is below:
