Answer:
Vertebrae
Explanation:
both birds and reptiles have a backbone or a <em>vertabrae. </em>therefore they are Vertebrates.
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The nervous system and the integumentary system<span />
A frameshift mutation<span> (also called a framing error or a reading </span>frame shift<span>) is a genetic </span>mutation caused<span>by indels (insertions or deletions) of a number of nucleotides in a DNA sequence that is not divisible by three.</span>
