Answer:
A vaccine works by training the immune system to recognize and combat pathogens, either viruses or bacteria. To do this, certain molecules from the pathogen must be introduced into the body to trigger an immune response. These molecules are called antigens, and they are present on all viruses and bacteria
Explanation:
The reaction is most likely to slow down or not occur as the enzymes will be denatured and their active site will not be able to fit onto the substrate of the molecule.
Answer:
It has many predators in the ocean.
Explanation:
Animals adapt to their environment because of their predators.