PLZ HURRY! I'm being time What is the approximate height range of the : Troposphere to Stratosphere to Mesosphere to Thermosphere to

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

Give examples of selective advantage of organism’s body part/organ

The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. why is this the case?