Answer:
Chargaff discovered base pairing rules. Franklin took X-ray photographs that revealed that DNA has a spiral structure. This finding helped Watson and Crick create a model of DNA and discover the double-helix.
Explanation:
Answer:a product consisting of a natural raw material; an unmanufactured product. Many primary products are exported for processing to the developed nations.
Explanation:
Urban people change their environment through their consumption of food, energy, water, and land. And in turn, the polluted urban environment affects the health and quality of life of the urban population. ... For example, urban populations consume much more food, energy, and durable goods than rural populations.
It disappears from existence completely, idk. ask your teacher. hope this helps!
