Transfer

Question 1

Diffusion

Answer 1

The net movement of particles from an area of high concentration to low concentration. Higher temp/Concentration= faster rate

Question 2

Osmosis

Answer 2

Movement of water particles from an area of high water concentration to low concentration
1. Measure mass of cylinders
2. Put in beaker of water/ solution(0.2 mol/dm to 0.6 mol/dm)
3.leave for hours and dry
ind- Concentration of solution dep- mass of cylinders cont-volume of solution
Pure water:mass increase Concentrated: mass decrease(water leaves potatoes)

Question 3

Active Transport

Answer 3

Movement of a substance from an area of low concentration to high concentration against a concentration gradient
Root hair cell- minerals in root hair(high) Low(soil) but Root hair cells need lots of minerals
Gut: Gut(low) Blood(high) because blood uses nutrients like glucose for respiration

Question 4

Phloem Literally transports food, Xylem literally controls movement

Answer 4

Phloem:
(Made of)Living cells, Translocation-food from plants/for storage transferred both ways.
Xylem:
-(Made of)Lignin-strengthens, Carries mineral ions from root to stem/leaves, Movement of water(Transpiration) root->xylem->leaves
Tanspire= Expire(loss): Evaporation/diffusion from leaves
Xylem vessels from roots replace shortage

Question 5

Stomata: Like the air heats (under leaf)

Answer 5

Light intensity:Greater Transpiration Rate.Dark-stomata closes(no CO2 let in) and no water escapes
Temperature:More energy,Faster rate- water particles diffuse out stomata
Air flow(Stronger wind): Faster transpiration rate.Diffusion: water vapour around leaf when there is poor air flow means there is high concentration outside and inside leaf(can’t be diffused). Good diffusion: water vapour swept away outside
Humidity: Drier around leaf=faster rate, Humid air contains water
Potometer: Air bubble-Tracks plant water intake on capillary scale
Under leaf: Cooler, less water loss

Question 6

Gaurd cells: TTS

Answer 6

Open/closes stomata
fill with water: Turns turgid(not flat-fat)
Opens stomata-gas exchange
shortage of water:Turns flaccid(flat)
-closes stomata stops water vapour escaping

Thin outer walls
Thick inner walls
Sensitive to light-close at night