Pearson Edexcel International GCSE Biology (4BI1) · EDEXCEL 4BI1
2 Structures and functions in living organisms
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Structures and functions in living organisms
- Explain why a plant with damaged roots that cannot absorb magnesium ions will show reduced… (4 marks, Explain)
- Explain how the pupil of the human eye changes size in bright light and describe the role … (4 marks, Explain)
- Explain how a reflex arc allows the body to respond rapidly to a painful stimulus, such as… (4 marks, Explain)
- Describe how auxin causes a plant root to respond to the force of gravity. (4 marks, Describe)
- Explain how a shoot tip responds to light coming from one direction only. (4 marks, Explain)
- Describe the roles of the lungs and the skin as organs of excretion in humans. (4 marks, Describe)
- Describe the role of the liver and the kidneys in the removal of urea from the body. (4 marks, Describe)
- Explain why the kidneys are described as organs of excretion. (4 marks, Explain)
- Describe the role of stomata in the excretion of waste gases from the leaves of a flowerin… (4 marks, Describe)
- Describe how oxygen produced during photosynthesis is removed from a flowering plant as a … (4 marks, Describe)
- Explain why the walls of arteries are thicker and more muscular than the walls of veins. (4 marks, Explain)
- Describe the structural features of villi that make them well adapted for the absorption o… (4 marks, Describe)
- Explain how water moves from the soil into the xylem of a plant root and then up through t… (4 marks, Explain)
- Describe the role of cilia and mucus in protecting the gas exchange system from damage cau… (4 marks, Describe)
- Describe the roles of the intercostal muscles and diaphragm during inhalation in humans. (4 marks, Describe)
- Explain why carbon dioxide produced during respiration in the leaf's palisade mesophyll ce… (4 marks, Explain)
- Explain why a flowering plant needs both photosynthesis and respiration to occur simultane… (4 marks, Explain)
- Explain how the structure of a leaf is adapted to allow efficient gas exchange in a flower… (4 marks, Explain)
- Explain why athletes who sprint a 100 m race continue to breathe rapidly for several minut… (4 marks, Explain)
- Explain why the mitochondria are important for aerobic respiration in muscle cells during … (4 marks, Explain)
▶ Practise Structures and functions in living organisms with instant AI marking (free) →