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19 January, 00:19

Which of the following traits is only found in vertebrates?

a. a highly developed nervous system and internal skeleton

b. a major function to obtain food and oxygen for energy

c. multi-cellular bodies

d. internal conditions are kept in balance

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Answers (2)
  1. 19 January, 00:34
    0
    a. a highly developed nervous system and internal skeleton

    Explanation:

    have a great day

    -Chilly
  2. 19 January, 00:47
    0
    A is the answer, every animal needs the other choices
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