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Both Sea Squirts and Lampreys Have a Perforated Pharynx, a Notochord

Question 1

Multiple Choice

Both sea squirts and lampreys have a perforated pharynx, a notochord at some stage of development, and a ventral heart. These similarities are best explained by which of the following hypotheses?


A) divergent evolution
B) the same type of cleavage pattern in the fertilized egg
C) likeness of dietary habit
D) common ancestry

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