The bonds or interactions that hold together adjacent nucleotides in the sugar-phosphate backbone of DNA are .The bonds or interactions that hold together complementary bases from opposite strands of DNA are hydrogen bonds. The bonds or interactions between stacked nucleotide units that help hold the DNA molecule together are .

maybe because its impossible for balloons to lift a whole entire house.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate