Which of the following does functions as part of the excretory and respiratory system? a. blood b. heart c. intestines d. lungs

Which of the following identifies the main culprit for america’s increasing weight gain?

Frankie is having difficulty developing a friendship with histeammate curtis. whenever frankie invites curtis to hangout with him at the park, curtis always says that he's busy. what is most likely preventing a healthy relationship fromforming? a)the boys are not being generous with their time andeffort. b)the boys are not communicating. c)both boys are too busy. d)the boys are on different teams.

Wjat are substances intentionally added to food to produce a desired effect?