A dog meets all the characerisitcs of life in the following ways - they maintain homeostatis, are made of cells, breathe and have a metabolism, are able to reproduce, pass their traits off to their offsp they grow and change, and and respond to their environment.
Answer:
The answer is: Clonal selection produces memory cells that are long-lived and can recognize the antigen in the future.
Explanation:
A scientific theory changes when there is more information available about what the theory covers.
It becomes denser when decreases temperature and increases in salinity. This means that the colder and saltier ocean water is, the denser it becomes.
