Why Multicellular Organims Discriminate Between Self And Non-self

Question 1

Why?

Answer 1

Immunity against foreign bodies
To not be self destructive
To eliminate cancers
Safety
Efficiency

Question 2

Evolution:

- overview

Answer 2

Series of germ-line encoded receptors they have been selected by evolution to recognise self from nonself

Question 3

Evolution:

- background

Answer 3

Increasingly hostile environment to comeback against
Innate and adaptive
PAMPs and TLRs