5. Half of the Earth is dark in the image below. What is the dark half of Earth experiencing?
A. A lunar eclipse
B. A solar eclipse
C. A power outage
D. Nighttime

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

What is the next step in the process after a substrate enters the active site of an enzyme

Which coal field location is related to coal fields in the eastern united states and supports the theory of continental drift? eastern india southern africa western australia northern south america