D.) "Pepsin" <span>speeds up the breakdown of proteins in food
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Answer:
An immune response is a reaction which occurs within an organism for the purpose of defending against foreign invaders. The first contact that an organism has with a particular antigen will result in the production of effector T and B cells which are activated cells that defend against the pathogen.
Explanation:
A diagram of the sequence of movements or actions of people or things involved in a complex system or activity.
External parts of the pig
