<span>The closer you are to the poles of the Earth, the fewer ecological niches for species to fill. </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.
Answer:
cellular respiration and photosynthesis work together by taking in energy such as the sun, or Co2 to convert that into energy and oxygen right back into the atmosphere.
Explanation:
Answer:
D
is the answer because as you see the percentage increase
