Structurally, vertebrae form joints connected by intervertebral discs.

The answer is symphysis joints. To simplify, vertebrae form symphysis joints connected by intervertebral discs. A symphysis or as called as the fibrocartilaginous joint is a joint in which the body of one bone come across the body of another. Completely but two of the symphyses lies in the vertebral or spinal column and all but one comprise fibrocartilage as an essential tissue. The momentary joint among the two halves of the jawbone is named the symphysis menti and is the only symphysis lacking fibrocartilage. All of the other symphyses are stable.

I’m not exactly sure what your trying to ask, but if it’s how an organelle is similar to a body system or a part a nucleus is like a in function. but i don’t fully understand what you’re trying to ask

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.