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m_a_m_a [10]
3 years ago
9

In which phylum do organs and organ systems first appear?

Biology
2 answers:
Klio2033 [76]3 years ago
5 0

Answer:

Platyhelminthes

Explanation:

Platyhelminthes, flatworms. this tissue covers the whole surface of the body. It is made up of cells closely packed and ranged in one or more layers.

vodomira [7]3 years ago
5 0

Answer: flatworms

Explanation:  Platyhelminthes, flatworms. this tissue covers the whole surface of the body. It is made up of cells closely packed and ranged in one or more layers.

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