Answer:
The population size grow /can grow
An electronic pulse oximeter, which can be clipped on the bridge of the nose, forehead, on the earlobe, or to the tip of finger, determines the oxygen concentration in arterial blood. Hemoglobin is the protein complex in blood that is responsible for carrying oxygen around the body. The pulse oximeter actually measures the concentration of hemoglobin in the blood and determines oxygen concentration from this value.
Answer:Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed.
Explanation:
Basically by planting more trees...
they'll use it for photosynthesis, nd give us Oxygen in return
Answer:
Carbon dioxide: Carbon dioxide is a molecule composed of one carbon atom bonded to two oxygen atoms via two double bonds. Carbon dioxide is a byproduct of exhaling and from the burning of fossil fuels. Its natural existence is in the form of a gas, which is inert and non harmful to humans in very low concentrations.
