6 Plant structures and their functions

Practice questions on Plant structures and their functions

• A farmer keeps her tomato plants in a greenhouse. During winter, the farmer notices that t… (4 marks, Explain)
• Explain why increasing the concentration of carbon dioxide in a greenhouse can increase th… (4 marks, Explain)
• Explain why photosynthesis is described as an endothermic reaction and explain how the pro… (4 marks, Explain)
• Glucose produced during photosynthesis can be used by plants in a number of ways. Describe… (4 marks, Describe)
• Explain how water moves from the soil into the xylem of a plant root, and describe how the… (4 marks, Explain)
• Explain the roles of stomata and guard cells in controlling water loss from a plant leaf. (4 marks, Explain)
• Explain why a plant wilts when the soil around its roots dries out, referring to the roles… (4 marks, Explain)
• Explain how auxins cause a shoot to grow towards a light source. (4 marks, Explain)
• Gibberellins are plant hormones with several commercial uses. Explain how gibberellins can… (4 marks, Explain)
• Ethene is a plant hormone. Explain how a fruit producer could use ethene to increase profi… (4 marks, Explain)
• A farmer wants to use a plant hormone to control weeds growing among their crop plants. Ex… (4 marks, Explain)
• A gardener wants to grow new rose plants quickly from cuttings. Explain how the gardener c… (4 marks, Explain)
• Explain how sugars produced in the leaves of a plant are transported to non-photosynthetic… (4 marks, Explain)
• Explain how the rate of transpiration in a plant would change on a hot, sunny, windy day c… (4 marks, Explain)
• A student investigates the effect of light intensity on the rate of photosynthesis in pond… (4 marks, Explain)