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. In which phylum do organs and organ systems first appear? a. Annelida b. Hemichordata c. Nematoda d. Platyhelminthes​
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. In which phylum do organs and organ systems first appear?

a. Annelida
b. Hemichordata
c. Nematoda
d. Platyhelminthes​

User Hoijof
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4 votes

Answer:

The answer is d. Platyhelminthes

User Venkat Peri
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