What is the control of this science project: the effect of colour on moods?

Explain why phospholipid molecules form a bilayer. (3 marks)

According to this food web which of the following would be considered primary consumers

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