Ozone is a blue colored gas. It is highly explosive and toxic even at low concentrations. It naturally occur in small concentration in one of the atmospheric layers called as stratosphere. It has a protective function in the stratosphere. It shields the earth by harmful radiations of ultraviolet and infrared light coming from the sun by readily absorbing them which are capable of causing huge damage to the living organisms.
According to the information given, the missing mRNA sequence strand is the 4th from the given option which is AUG AAA CGU CCU. As the complementary of A in RNA is U, G is C and for T is A.
Since the question states that they want to determine the population of the desert mice. You get the direct answer from just using context clues. Since population means one species in a certain area, it means that this method will work if the mice stay in the same area.
Gas exchange occurs at the alveoli in the lungs and takes place by diffusion. The alveoli are surrounded by capillaries so oxygen and carbon dioxide diffuse between the air in the alveoli and the blood in the capillaries.
