Plz   justin is planning his science fair project. he wants to measure how oxygen levels affect the rate of photosynthesis in plants. is this an example of a scientific investigation or an experiment? a. an experiment because it tests a cause and effect relationship b. an experiment because it does not ask a testable question c. an investigation because it uses only observations d. an investigation because there is a control group

Which of the following are not included as modern mammals that evolved during the eocene epoch? primates artiodactyls perissodactyls none of the above

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.

The hypothesis that evolution occurs at an irregular rate through geologic time is known as: directional evolution directional equilibrium punctuated equilibrium punctuated evolution