Yes, all animals inhale (in) and exhale (out). Except for fish.
The structures a virus can contain are
-nucleic acid
-envelope
-capsid
<span>Organisms used to be classified in the earliest times according to their size. As science progressed, they started getting organized by their physical traits and now they're organized by traits found in their species that are not found in others based on the theory of evolution. They are classified according to how they developed from a starting organism.</span>
Oh yeahhh thanks for the points
