In separating DNA for genomic analysis, do scientists need to consider RNA contamination during the cell lysis step of a DNA extraction? a) yes, because DNA will combine with RNA

b) no, because DNA separates the supernatant

c) yes, because the protease destroys the DNA

d) no, because the RNA does not affect the DNA

In which of the following relationships is one organism always benefited while the other organism is always harmed

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian

How do temperature and salinity affect deepwater currents? 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. 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 density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water.