Diffusion, osmosis and gas exchange Crossword

What is the main process involved in gas exchange?
What is the name of a gas involved in gas exchange?
What is the name of another gas involved in gas exchange?
Which colour of blood is involved in gas exchange?
Is active transport active or passive?
Is diffusion active or passive?
How many cells thick are the walls of alveoli/ capillaries?
What is needed for active transport to occur?
Does active transport occur along or against a concentration gradient?
Does diffusion occur along or against a concentration gradient?
What subcellualar structure if vital during the absorbtion of amino acids?
What region of concentration does diffusion start from?
Which region of concentration do the particles diffuse to in diffusion?
Are the walls of alveoli thin or thick?
What do plants need to grow and survive
Does having a larger surface area increase the plant's appetite?
What does a larger surface area do?
Which plant cell absorbs minerals and water?
Which solution affects a potato's mass when reacting with it in various concentrations?
Does a lower sucrose concentration mean the potato's percentage change in mass will be higher or lower than it would be for a higher sucrose concentration?