(Question)
Q: How many chambers are in the heart? Choices: - two - eight - five - four A:
(Answer)
four

(Question)
Q: What term is used to describe an immunity that occurs after exposure to an antigen either from a pathogen or a vaccination? Choices: - variation immunity - autoimmunity - herd immunity - adaptive immunity A:
(Answer)
adaptive immunity

(Question)
Q: Where do living things obtain the energy to carry out all life processes? Choices: - fuel - waste - oxygen - food A:
(Answer)
food