PLEASE HELP FAST
Which of the following properties of DNA was discovered by James Watson and Francis Crick?

DNA is composed of four bases.

DNA looks like a long, twisted ladder.

DNA nucleotides always combine in the same pairs.

DNA has a doughnut shape when viewed using x-ray

Idon't really understand the question. it counts for 20% of my lesson grade and i really need putting the answer into words. anything will . i need asap so im awarding 30 points.a disagreement between states of the united states concerning the rights of states vs. the authority of the national government led to the civil war. state governments were forced by war into a subservient position. what might happen if national governments ceded their authority to a world government by international treaty?

How did the battle of okinawa affect president truman’s decision to use the atomic bomb against japan? it showed that japan was close to surrendering. it showed that the us could not win the war without it. it showed that japan was willing to fight to the end. it showed the us could easily defeat japan.

Which group of native arkansas used northwestern arkansas as its traditional hunting grounds? osage mississippian woodland quapaw 35 points plz