What conclusions about atoms can you draw from the modern atomic model shown below? choose all that apply.

Diffusion and osmosis are forms of passive transport

Which of these parts of the membrane large moecules pass through it ?

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins