Which process do plants use to absorb nitrates from the soil?
Active transport
Diffusion
Osmosis
Which factor will decrease the rate of diffusion across a membrane?
Increasing the surface area of the membrane
Increasing the differences in concentration outside and inside the membrane
Decreasing the temperature
What happens to red blood cells when they are placed in water?
They shrivel as water is lost by osmosis
The cells are unchanged as water moves in and out by osmosis
The cells swell up and may burst
Which of the following is a correct statement about osmosis?
Water moves from a concentrated solution to a dilute solution across a partially permeable membrane
Water moves from a region of high concentration to a low concentration across a partially permeable membrane
Water and sugar move from a region of high concentration to a low concentration by osmosis
Which of the following involves passive movement?
The movement of glucose through the gut wall into the blood
The movement of carbon dioxide into a leaf
The movement of mineral ions into a plant root hair cell
In which direction do water particles move in osmosis?
High to low concentration
Low to high concentration
They don't move
What substance moves by osmosis?
Oxygen
Water
Carbon dioxide
What happens to diffusion if the temperature is increased?
It increases
It stays the same
It reduces
What must water molecules move through in osmosis?
A cell wall
A partially permeable membrane
A totally permeable membrane
What happens to plant cells that are put into a concentrated solution?
Nothing
Cytolysis
Plasmolysis