The major function of the immune system is to protect the host from environmental agents such as microbes or chemicals, thereby preserving the integrity of the body. This is done by the recognition of self and response to non-self.
Structural Support, Good luck
Plants and animals affect neighboring cells directly because
when in terms with the plants, they use their plasmodesmata in which allowed
them to communicate and affect neighboring cells. While the animals use their gap
junctions that is use for them to communicate and affect their neighboring
cells.
It is called chromatin, it is unraveled DNA
