How and why humans make changes to their
ecosystems. Are these changes negative or positive?

What would happen if the krill were removed from the food web

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

Which organism can most likely be classifild as domain bateria