iGCSE revision powerpoint 1 There are 66 questions

Variety of life There is a wide variety of living organisms. Can you name some of the groups of living things? 1. P............... 2. A............... 3. B............... 4. F............... 5. V...............

Animal cells 6 on the left 7-10 on the right

Plant cells A to D = 11-14 15. what does the nucleus do? 16. What happens in the cytoplasm? 17-19 which 3 things do plant cells have that animal cells don’t?

Specialised cells 20 What is this? 21. How does its structure help it to carry out its function? 22 What is this? 23 How does its structure help it to carry out its function?

Diffusion and osmosis Write a definition for diffusion. Osmosis is the movement of .....25...... From a ........26.......... To a ......27........ Solution, across a .......28.......... 29 – 30 (H) name three conditions which would speed up the rate of diffusion.

Active transport 31. Active transport moves substances .................. a concentration gradient. 32. This requires .................. to work. 33. This is produced by the process of ................. 34. This process happens in the ........................... 35. Give an example of active transport in plants. 36 and 37. Give two examples of active transport in humans.

Excretion 38 and 39 Name two gases that are excreted from leaves. Name the little holes that they escape from. 41 and 42 Name two organs of excretion in animals. 43 What is the long word which describes the kidney’s job of maintaining a balanced water level in the blood?

Kidney 1 44 - 47 top to bottom on this diagram.

Kidney 2 48 – 53 = A to F 54 What is the structure in the pink box called?

Kidney 3 55 = a 56 = b 57 = c and d 58 = i, h and g 59 = e

Kidney 4 What happens in the Bowman’s capsule? (H) What happens in the proximal convoluted tubule? What happens in the collecting duct? What is the name of the hormone that regulates the water content of the blood? 64 – 66 Name three things found in urine