Who confirmed the three-dimensional structure of dna?
who first discovered dna and named it “nuclein.”?
what was the first photo of dna which scientists understand its structure?
who studied dna using special x-rays?

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

Select all the correct answers. which three statements about electromagnetic radiation are true?

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.