Answer:
How Does the Immune System Work?
Innate immunity: Everyone is born with innate (or natural) immunity, a type of general protection. ...
Adaptive immunity: Adaptive (or active) immunity develops throughout our lives. ...
Passive immunity: Passive immunity is "borrowed" from another source and it lasts for a short time.
Answer:
Natural selection depends on the enviroment
Explanation:
Natural selection does not prefer features that are superior in some way. Instead, it favors characteristics that are advantageous in a particular setting. Characteristics that are beneficial in one context may be harmful in another.