What clues, symptoms and opportunistic diseases were observed during that period that signaled the start of a new infectious disease

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

Andra has a family history of osteoporosis. her doctor advises her to eat foods rich in calcium. which foods should she add to her diet? a. fruits, especially grapes and berries b. unsaturated fats like olive and soybean oil c. beet greens, broccoli, and cheese

During a formal discussion in his science class, kai will be speaking about the important of exercise. what is the best advice he can follow to be a prepared speaker