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B4 Revision

B4 Revision. 113 Questions. GCSE Gateway Biology B. Contents. 1. Who planted that there? … 10 questions. 2. Water, water everywhere … 19 questions. 3. Transport in plants … 10 questions. 4. Plants need minerals too … 19 questions. 5. Energy flow … 16 questions.

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B4 Revision

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  1. B4 Revision 113 Questions GCSE Gateway Biology B

  2. Contents 1. Who planted that there? … 10 questions 2. Water, water everywhere … 19 questions 3. Transport in plants … 10 questions 4. Plants need minerals too … 19 questions 5. Energy flow … 16 questions 6. Farming … 22 questions 7. Decay … 9 questions 8. Recycling … 8 questions

  3. Who Planted That There? Chapter 1 10 Questions Back to contents page

  4. Question 1 Identify the parts of a plant cell ? Cell wall Cytoplasm ? Cell membrane ? Nucleus ? Vacuole ? Chloroplasts ?

  5. Question 2 What is the role of chloroplasts? To absorb light energy for photosynthesis

  6. Question 3 Where does photosynthesis mainly occur? In the leaves

  7. Question 4 What 2 things are needed for photosynthesis? Water thought the roots Carbon dioxide through leaf pores

  8. Question 5 What is given out by photosynthesis? Oxygen through leaf pores

  9. Question 6 ? ? Locate the parts of a leaf ? ? ? ? ? ? ? ? ?

  10. Question 7 • Broad, so large surface area • Thin, so short distance for gases to travel • Contain chlorophyll to absorb light • Have a network of veins for support and transport • Stomata for gas exchange How are leaves adapted to photosynthesis?

  11. Question 8 The exchange of gases in the stomata is by ? Diffusion

  12. Question 9 How is the structure of a leaf palisade cell related to its function? It contains many chloroplasts

  13. Question 10 How is the cellular structure of a leaf adapted for efficient photosynthesis? (Complete the sentence) 1. Epidermis is thin and transparent . . . To allow more light to reach the palisade cells

  14. Question 10 How is the cellular structure of a leaf adapted for efficient photosynthesis? 2. Thin cuticle made of wax . . . To protect the leaf without blocking out light

  15. Question 10 How is the cellular structure of a leaf adapted for efficient photosynthesis? 3. Palisade cell layer at top of leaf . . . Contains most of the chloroplast, to absorb more light

  16. Question 10 How is the cellular structure of a leaf adapted for efficient photosynthesis? 4. Air spaces in the spongy layer. . . Allow carbon dioxide to diffuse between the stomata and photosynthesising cells, and increase the surface area

  17. Question 10 How is the cellular structure of a leaf adapted for efficient photosynthesis? 5. Palisade cells contain many chloroplasts. . . To absorb all the available light

  18. Water, Water Everywhere Chapter 2 19 Questions Back to contents page

  19. Question 1 How does water move in and out of plant cells? Through the cell wall and membrane

  20. Question 2 What is the role of the plant cell wall? To provide support

  21. Question 3 A lack of water can cause…? Plants to droop (wilt)

  22. Question 4 • Absorption from soil through root hairs • Transport through the plant to the leaves • Evaporation from the leaves (transpiration) Describe how water travels through a plant

  23. Question 5 Healthy plants must do what? They must balance water loss with water uptake

  24. Question 6 The movement of water across a partially permeable membrane from an area of high concentration ( ie. dilute solution) to an area of high concentration (ie. concentrated solution) What is osmosis?

  25. Question 7 Osmosis is a type of ? Diffusion

  26. Question 8 A membrane that allows some small molecules to pass through but not larger molecules Explain the term ‘partially permeable’

  27. Question 9 What is essential for the support of plants? The inelastic wall and water

  28. Question 10 By increasing the surface area, root hairs increase the ability of roots to take up water by osmosis What is so special about root hairs?

  29. Question 11 • Cooling • Photosynthesis • Support • 4. Movement of minerals Transpiration provides plants with water for…?

  30. Question 12 How is a leaf adapted to reduce excessive water loss? • Waxy cuticle • 2. Small number of stomata on upper surface

  31. Question 13 • An animal cell does not have a cell wall It will: • Swell and burst (lysis) when too much water enters • Shrink, causing crenation, when too much water leaves Describe the effects of water uptake and loss on animal cells

  32. Question 14 How are plants supported by the turgor pressure within cells? By the wall pressure acting against inelastic cell wall

  33. Question 15 What is essential for the support of plants? The inelastic wall and water

  34. Question 16 Explain the term ‘flaccid’ floppy

  35. Question 17 The shrinking of a plant cell due to loss of water, the cell membrane pulls away from the cell wall Explain the term ‘plasmolysis’

  36. Question 18 Plant cells which are full of water with their walls bowed out and pushing against neighbouring cells are turgid Explain the term ‘turgid’

  37. Question 19 • Changes in guard cell turgidity to regulate stomatal apertures • 2. Number, distribution, position and size of stomata How is the cellular structure of a leaf adapted to reduce water loss?

  38. Transport In Plants Chapter 3 10 Questions Back to contents page

  39. Question 1 What is the role of the … Stem: Support, transport Leaf: Photosynthesis Flower: Reproduction Root: Water and mineral uptake, anchorage

  40. Question 2 Describe the arrangement of xylem and phloem in a dicotyledonous root, stem and leaf Vascular bundles

  41. Question 3 Transpiration, movement of water and minerals from the roots to the shoot and leaves What is the function of xylem?

  42. Question 4 Translocation, movement of food substances (sugars) up and down stems to growing and storing tissues What is the function of phloem?

  43. Question 5 What do xylem and phloem form? Continuous systems in leaves, stems and roots

  44. Question 6 Thick strengthened cellulose wall with a hollow lumen (dead cells) Describe the structure of xylem

  45. Question 7 Describe the structure of phloem Columns of living cells

  46. Question 8 What is transpiration? The evaporation and diffusion of water from inside leaves

  47. Question 9 • Increase in light intensity • 2. Increase in temperature • 3. Increase in air movement • 4. Decrease in humidity Transpiration rate is increased by…?

  48. Question 10 Why does the rate of transpiration increase when … (Complete the sentence) 1. There is an increase in light intensity? Because the stomata opens up. This allows more water to escape

  49. Question 10 Why does the rate of transpiration increase when … 2. There is an increase in temperature? Because as the temperature increases, the random movement of water molecules increases and more water escapes

  50. Question 10 Why does the rate of transpiration increase when … 3. There is an increase in air movement? Because wind causes more molecules near stomata to be removed. This increases evaporation and diffusion from inside the leaf

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