There would be a 50 percent
Sponges, medusa and polyp, gymnosperm
<span>The trait is only an adaptation if it gives the squirrels an advantage in their habitat.</span>
The pneumatic bones are important to birds for respiration. They are hollow bones which are connected to the bird's respiratory system and are important for birds to be able to breath. Examples of pneumatic bones are the skull, humerus, clavicle, keel (sternum), pelvic girdle, and the lumbar and sacral vertebrae.
