External parts of a leaf practice exercise 3

A farmer in Tharaka wants to breed crops with faster photosynthesis. Which external part of the leaf should they observe closely and why? (2 marks)

A learner forgets the name of the part that runs down the center of a leaf and distributes water. What is this part called and how can you help them remember it? (2 marks)

A pupil notices a leaf with a jagged edge during a nature walk. What is this external part called and how would you describe it? (2 marks)

A student compares leaves from Nairobi and Turkana and notes differences in their structure. Explain any two external parts of the leaf which might vary due to climate. (2 marks)

A student compares leaves from Nairobi and Turkana and notes differences in their structure. Explain any two external parts of the leaf which might vary due to climate. (2 marks)

A tea farmer in Kisii observes that tea leaves are broader compared to maize leaves. Which external part of the leaf explains this difference and what is its function? (2 marks)

During a field trip to Karura Forest, learners picked up different leaves. How could they identify the petiole, lamina, margin, and apex using only visible features? (4 marks)

During a nature walk, learners collected leaves and were asked to point at the petiole. How can you help them correctly identify the petiole? (1 mark)

During a nature walk, learners collected leaves and were asked to point at the petiole. How can you help them correctly identify the petiole? (1 mark)

Study the diagram of a leaf below and use the labeled parts A, B, C, and D to explain how each one contributes to the leaf’s role in photosynthesis and survival of the plant. (4 marks)

Study the diagram of a leaf below and use the labeled parts A, B, C, and D to explain how each one contributes to the leaf’s role in photosynthesis and survival of the plant. (4 marks)

Study the leaf diagram below. Identify and explain the function of the midrib and petiole. (2 marks)

Study the leaf diagram below. Identify and explain the function of the midrib and petiole. (2 marks)

Two learners argue about whether the leaf edge is a part of the leaf. What is this part called and how can you explain its appearance? (2 marks)