Defenses such as your skin respiratory system, digestive and circulatory system 1. First Line
2. Allergy
3.T cell

2. how is heavy water different from normal water

Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?

Identify a specific example for each type of technology