Answer:
a. antigen
Explanation:
The Immune system is composed of immune cells that defend the body against foreign substances such as bacteria or virus. Lymphocytes (B and T cells) are one of the main immune cells
Lymphocytes have the ability to recognize and bind to antigens, wich are substances foreign to the body ( i.e bacterial or virus elements) that evokes an immune response.
Answer:
Either A or B.. I Would most likely choose A but I'd assume either one
Explanation:
Because a population is the breeding in a specific area.. and Bald Eagles could travel distances from other while fish in a lake would be one area and they would most likely be breeding, as well as the tree one is in a given area, but they don't specifically breed so i'd assume A.
( Also I like your pfp JJK manga and anime is really good )
Answer:
I think it is C intersexed but its not B for sure
Explanation:
