You are called to a nursing home for an 85-year-old patient complaining of abdominal pain. the patient has a history of dementia and cannot describe the pain to you. the nurse states the patient has been vomiting dark coffee ground emesis for about an hour. his blood pressure is 90/40, pulse 100, and respiratory rate of 24. auscultating this patient's bowel sounds:

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

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.