29. Name two things you can do to help preserve tropical rain forests.
30.
A. What are the two samples of DNA that are needed in order to identify the DNA as
belonging to a specific person?
B. What is a problem with partial DNA samples? In your answer, include how databases
relate to this problem.
31.
A. List six ways that you personally can cut down on CO, emissions to the atmosphere.
B. Hypothesize how small changes in energy use can make a significant difference in CC
emissions.

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.