Do snakes have tails or is it just head and tail? Alright, listen up. Snakes. More specifically, their bone structure, it’s just a skull and spine. A tail is essentially just a part of the spine extending outwards to create a separate limb/attachment. So would a snake just be a head and then tail (unless a rattlesnake) and if not, where exactly would the tail part start?

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas