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Author Question: ____________ possess backbones. Fill in the blank(s) with the appropriate ... (Read 18 times)

joe

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____________ possess backbones. Fill in the blank(s) with the appropriate word(s).

Question 2

The most structurally complex animal phylum is the ____________, in which members possess a stiffening
  ____________, a tubular dorsal nervous system. Fill in the blank(s) with the appropriate word(s).




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aham8f

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Answer to Question 1

Vertebrates

Answer to Question 2

Chordata; notochord



joe

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aham8f

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