Como era el clima de la era paleozoica​

Closing a ring restricts the rotation around individual car bon carbon bonds hope it will you !

Air enters through the nose (and sometimes the mouth), moves through the nasal cavity, the  pharynx, the  larynx, enters the  trachea, moves through the  bronchi  andbronchioles  till the alveoli.

The answer would be semen as a whole but the cells contained are called sperm and they fertilize the eggi hope this