ANSWERS: 3
  • Nope.There can even be a dissimilarity of the number amongst the same species at different growth periods. see here http://www.easternct.edu/depts/edu/textbooks/skeleton.html
  • No. Some mammals have bones that other mammals don't. I'll give some examples. Carnivores such as dogs have a bone in their penis (the os penis). Also, the number of ribs varies from species to species. For example, horses have 18 pairs of ribs, dogs have 13.
  • i am the walrus!!

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