Which of the following discoveries played a key role in watson and crick’s discovery of dna’s structure? (select all that apply)
a) charagraffs discovery that dna hold equal mounts of adenine and thymine, and equal amounts of guanine and cytosine.
b) hershey and chase's experiment with bacteriophage that confirmed dna was heredity material.
c) marie curie's discovery of radium that enables x-ray images to be taken
d) frankie and wilkins x-ray diffraction images revealing dna as a tightly coiled helix

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?

What drives the atp synthase reactions that produce atp