Question

Which of the following do all vertebrates have in common? More than one answer is possible.A. mammary glandsB. craniumC. vertebral columnD. specialized teeth

Answer 1

Answer:

The correct answer is vertebral column and cranium

Explanation:

Vertebrates are the animals that are characterized by having backbone or vertebral column and apart from the vertebral column they also have a bony skull. Skull and vertebral column protect the brain and spinal cord in vertebrates.  

Vertebrata is a subphylum under phylum Chordata and clade Craniata so vertebrates have both cranium and vertebral column. In vertebrates, notochord is present in the embryonic stage and is replaced  by vertebral column in adults.

Animals that comes under the Vertebrata are fishes, mammals, reptiles, amphibians, and birds. So the correct answer is B and C.