Spine
This page is the CodyCross answer for the clue below from Fauna and Flora, Group 175, Puzzle 3 (Alternation of Generations).
Question is: Spine
and the answer is: BACKBONE
Word Meaning:
BACKBONE — (countable) The series of vertebrae, separated by disks, that encloses and protects the spinal cord, and runs down the middle of the back in vertebrate animals.
Definitions from Wiktionary.