B4 a-d Pig (F)

 Name the pores in the bottom of a leaf

 Stomata

 What is the job of air spaces?

 Allow gases to diffuse from palisade cell to air/air to palisade cell

 List 3 adaptations of a leaf for efficient photosynthesis

 Broad (large surface area)  This (short diffusion distance)  Palisade cells have many chloroplasts (containing chlorophyll)  Veins bring water/remove sugar  Stomata allow carbon dioxide in/oxygen out

 What is osmosis

 Diffusion of water from a high water concentration to a low water concentration across a partially permeable membrane

 What is a partially permeable membrane?

 A membrane that only lets certain (small) molecules, like water, through

 What will happen to a red blood cell if you inject pure water into your veins?

 Water will enter the cell by osmosis until it bursts

 What do you call a plant cell that has lost a lot of water by osmosis

 Flaccid/plasmolysed

 Name tube Z

Phloem

 What is the job of phloem?

 Transporting sugars around the plant

 What is this device called and what is it for?

 Potometer  Measuring water uptake (allow transpiration) in a plant

 What is transpiration?

 Loss of water vapour from the leaves

 List 2 ways of increasing the rate of transpiration

 Increase temperature  Increase wind speed  Decrease humidity  Increase light intensity

 List 4 minerals needed by a plant

 Nitrate  Phosphate  Potassium  Magnesium

 Why does a plant need magnesium?

 To make chlorophyll (for photosynthesis)

 What will a plant look like if it is grown with very little nitrate?

 small

 How do minerals enter a root hair?

 Active transport