Staphylococcus aureus is a species of bacteria that have invaded the human body for a long time. Humans scientifically created an antibiotic, methicillin, to fight off the bacteria, but in return, the
Staph bacteria developed resistance to the methicillin and are now considered a new strain called
methicillin-resistant Staphylococcus aureus (or MRSA.) Therefore, humans had to develop even
stronger antibiotics to fight it. What pattern of evolution does this exhibit?

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

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.