Answer:
Great interdependence.
Explanation:
There is a great interdependence between healthy population and its environment because the environment has direct effect on health of people that lives in it. If the environment has pollution so it can causes different diseases and infections in the body of people that lives and expose to that environment while on the other hand, if the environment is clean so it causes good effect on the individuals.
Concept 19 The DNA molecule is shaped like a twisted ladder. James Watson and Francis Crick solved the structure of DNA. Other scientists, like Rosalind Franklin and Maurice Wilkins, also contributed to this discovery.
Well, the cells and bricks are similar because cells are the building blocks of life and bricks are the building blocks of buildings. Cells are necessary for life, bricks are necessary for buildings.
They are different in the way of cells have nucleus'es (plural form of nucleus, I suppose) and other things inside it that do jobs, bricks don't have that.