The net movement of particles from a region of high concentration to a region of low concentration i.e. down the concentration gradient
Factors: 1) Temp
2) Distance to diffuse
3) Concentration gradient
4) Surface Area to volume ratio
The net movement of water molecules from an area of high water concentration to an area of low water concentration across a selectively permeable membrane.
The movement of particles against a concentration gradient using energy
Water + CO2 = Glucose + Oxygen
- use light energy caught in chlorophyll to rip water molecules apart
Convert light energy to chemical energy
PLANTS NEED MINERALS
Nitrates - amino acids and proteins
Lack of = poor growth + yellow leaves
Magnesium - make chlorphyll
Lack of = leaves turn yellow
Phosphates - cell mebranes and DNA
Lack of = poor root growth + leaves purple
Potassium - enzyumes
Lack of = poor fruits + discoloured leaves.
Breakdown by organism to small organic compounds of complex nutrient
Enzymatic release of energy from organic compounds which requires O2 or not
Oxygen + Glucose = Carbon doixide + Water + Energy
Glucose = Lactic Acid + Some energy
Ceels need constant supply of oxygen for respirtation and remove carbon dioxide, respiratory system allow exchange to take place efficiently.
Maintains steep diffusion gradient in alveoli.
The evaporation of water from the surface of a plant
2. Wind speed
4. Light intensirt
Because of transpiration it causes water to be pulled up xylem in stem and roots in a continuous flow
Is the removal of toxic waste from the body e.g. waste products of chemical reaction, excess water and salts taken in with diet and spent hormones.