Im going with Genes inserted from other organisms.
It is always working.
It even works while the person is sleeping to push saliva down the throat.
Humans and animals both eat, sleep, think, and communicate. ... Some people think that the main differences between humans other animal species is our ability of complex reasoning, our use of complex language, our ability to solve difficult problems, and introspection (this means describing your own thoughts and feelings).
Answer:
individuals of the same species that live in the same area
Answer:
acidophiles
Explanation:
Acidophiles are organisms that can withstand and even thrive in acidic environments where the pH values range from 1 to 5.
