EVERYDAY SCIENCE

Detailed explanation-1: -The correct option is A diffusion. Gases like carbon dioxide and oxygen can move across the cell membrane via diffusion. Diffusion is the movement of gas molecules from a region of higher concentration, to a region of lower concentration through a semi-permeable membrane.

Detailed explanation-2: -Oxygen and carbon dioxide and most lipids enter and leave cells by simple diffusion.

Detailed explanation-3: -Oxygen and carbon dioxide move across cell membranes via simple diffusion, a process that requires no energy input and is driven by differences in concentration on either side of the cell membrane.

Detailed explanation-4: -Oxygen diffuses through the cell membrane and is transported in blood plasma by free diffusion and by convection.

Detailed explanation-5: -Oxygen delivery to tissue mitochondria relies on simple diffusion in the target cells and tissues.