-Presence of jointed appendages and gills, lungs, jaws.
-Presence of a chitinous external skeleton or exoskeleton that change periodically.
-Body constituted by repetitive segments, phenomenon known as metamerism<span>.</span>
<span>I hope this help,</span>
<span> Sebastian Goicoechea.</span>
Answer: B
Explanation:
The way something is arranged enables it to play its role, fulfill its job, within an organism (a living thing). Structure-function relationships arise through the process of natural selection.
Answer:
D
Explanation: the bones can becomew brittle from not haveing calcium
