12
But what I got taught was that in a haploid cell there was 23 but that may be in a specific thing.
Trilobites are found worldwide and evolved rapidly, making them easily distinguishable from trilobites of other time periods
Answer:
Three primary components of axial skeleton are skull, vertebral column and ribs.
Explanation:
Axial skeleton forms the central axis f the body. Three primary component of axial skeleton are:
Skull: Skull protects the brain and supports the face structure. Twenty two bones are present in the skull. Two main categories of skull bone are cranial bone and facial bone.
Vertebral column: Vertebral columns support and protects the spinal cord. The vertebral column serves as the attachment site for the muscles and neck.
Ribs cage: Ribs cage is also known as thoracic cage and includes the structure of sternum, ribs, coastal cartilage and thoracic cartilage. Ribs consists of twelve bones.
I think verterbrates have a back bone others do not. I only THINK so.
