Which stimulus is most likely to cause a shivering response in a human? O A. A squirrel perches on a branch. O B. The temperature drops at night. C. A tree releases pollen into the air. O D. The Sun rises overhead at noon.

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

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions