3 years ago

Fishes, amphibians, reptiles, birds, and mammals all have an internal skeleton with a _______. Fill in the blank.

Biology

2 answers:

rewona [7]3 years ago

4 0

Hi there!

I believe the answer is a spinal cord - all of these animals are vertebrates.

Hope this helps!

andreev551 [17]3 years ago

3 0

All have a vertebrae or spinal cord

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