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.
The total amount of sea ice showed a decline from 2012 to 2019. The correct option would be D.
<h3>Graphical illustration</h3>
Looking at the graph, from February to June 2012, there is a decline in the amount of sea ice.
A similar decline in the amount of sea ice can be observed in the year 2019.
However, the sea ice levels for the various months in 2012 remain generally above the sea ice levels in the various months in 2019.
Thus, overall, one can say there is a general decline in the ice level from 2012 to 2019.
More on graphical illustrations can be found here: brainly.com/question/21376268
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Answer:
The answer should be B
Explanation:
The nucleus has the genetic code to make protein.
Answer:
A.
Explanation:
bacteria have cell membranes to mimic a normal cell. this protects the bacteria from being consumed by the body's natural defences .
