DNA is a large organic molecule that has a shape described as a “double helix” shown in a cartoon, right. Given what you know about the carbon molecule’s geometry (Q6) does this shape make sense? Why or why not?

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2

Which radioisotope is used to date fossils? a. oxygen-16 b. carbon-14 c. uranium-238 d. carbon-12