3.5 Energy Transfers In and Between Organisms

Practice questions on Energy Transfers In and Between Organisms

• Explain why the rate of photosynthesis in a plant increases as light intensity increases, … (5 marks, Explain)
• Explain why farmers growing crops in greenhouses sometimes pump extra carbon dioxide into … (5 marks, Explain)
• Explain how water is cycled between the environment and living organisms. (5 marks, Explain)
• Explain how carbon in the bodies of dead organisms is returned to the atmosphere. (5 marks, Explain)
• Explain how phosphorus from the bodies of dead organisms is returned to the soil and then … (5 marks, Explain)
• Explain the role of decomposers in the carbon cycle. (5 marks, Explain)
• Explain why farmers who rear livestock often use indoor housing and controlled feeding pro… (5 marks, Explain)
• Explain why the efficiency of energy transfer between trophic levels is important when con… (5 marks, Explain)
• A farmer grows wheat and uses it to feed cattle. The farmer is considering whether to sell… (5 marks, Explain)
• Describe how energy is lost from a food chain at each trophic level, and explain why this … (5 marks, Describe and Explain)
• Explain why only a small percentage of the energy available at one trophic level is transf… (5 marks, Explain)
• A student investigates the rate of respiration in yeast. She mixes yeast with glucose solu… (5 marks, Explain)
• A marathon runner is able to complete a 26-mile race using aerobic respiration. However, i… (5 marks, Explain)
• A student runs a 400 m race. During the race, her muscles begin to respire anaerobically. … (5 marks, Describe and Explain)
• Explain why cells need to carry out respiration and describe what happens during aerobic r… (5 marks, Explain)
• Explain why the leaves of most plants are broad and flat, and contain chlorophyll, in term… (5 marks, Explain)
• A student places a green aquatic plant in a solution containing magnesium ions and carbon … (5 marks, Explain)
• Explain why a plant kept in a dark cupboard for several days will eventually die, even if … (5 marks, Explain)
• Bread dough rises when yeast is added to a flour and water mixture. Explain why the dough … (5 marks, Explain)
• Describe how nitrogen from the atmosphere is made available to plants, and explain why pla… (5 marks, Describe and Explain)