What is osmosis?

• Movement of a substance down a concentration gradient

• Diffusion of water molecules down a concentration gradient

• Movement of a substance against a concentration gradient

• Movement of substances using energy

Which process requires energy?

• Diffusion

• Osmosis

• Active transport

• All of the above

Which transport process is specifically for water molecules?

• Diffusion

• Osmosis

• Active transport

• Filtration

What is the role of concentration gradient in diffusion?

• It prevents movement of substances

• It allows movement of substances against the gradient

• It facilitates movement of substances down the gradient

• It has no role

Which process is essential for nutrient uptake in cells?

• Diffusion

• Osmosis

• Active transport

• Evaporation

What determines whether diffusion, osmosis, or active transport is used?

• Type of cell

• Properties of the substances

• Temperature

• Size of the cell

Which process is involved in waste removal from cells?

• Diffusion

• Osmosis

• Active transport

• All of the above

What is the main characteristic of a semi-permeable membrane?

• Allows all substances to pass

• Blocks all substances

• Allows certain substances to pass

• Is impermeable to water

What is the main purpose of active transport in cells?

• To move substances down a concentration gradient

• To move substances against a concentration gradient

• To move water molecules

• To prevent movement of substances

What is the main factor that influences diffusion?

• Energy availability

• Concentration gradient

• Type of cell

• Temperature