A twisted ladder can be a model of the structure of a DNA molecule. In this model, what are the sides of the ladder made of? A. Nitrogen bases B. Amino acids C. Sugar and phosphate parts D. Oxygen and nitrogen

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?

What are fossils of organisms that existed over a wide area but only for a limited time period called?

27 drag each label to the correct location on the image. a particular exosolar system has five planets in total: a, b, c, d, and e. the table lists the orbital periods of these planets in days. planet orbital period (days) a 600 b 80 c 1,000 d 500 e 100 move each planet to its orbit in the system.