4 Energy, reproduction and populations

Practice questions on Energy, reproduction and populations

• A student grows some algae in a sealed, transparent container filled with water. The algae… (5 marks, Explain)
• A peat bog is a waterlogged ecosystem where dead plant material accumulates over thousands… (5 marks, Explain)
• A sports scientist is studying the effects of exercise intensity on respiration in athlete… (5 marks, Explain)
• A species of moth lives in a forest. The moths vary in wing pattern — some have spotted wi… (5 marks, Explain)
• A species of freshwater fish lives in a river. The fish vary in body size. Larger fish req… (5 marks, Explain)
• A species of Arctic fox lives in a tundra ecosystem. The foxes have white fur and feed on … (5 marks, Explain)
• A species of ground-dwelling beetle lives in a woodland. The beetles vary in shell colour,… (5 marks, Explain)
• A population of rabbits lives in a field. Over several years, a new strain of a pathogen s… (5 marks, Explain)
• A group of students is investigating the decomposition of leaf litter in two forest areas.… (5 marks, Explain)
• A marine ecosystem contains phytoplankton (producers), krill (primary consumers), fish (se… (5 marks, Explain)
• A wildlife organisation is investigating the carbon cycle in a woodland ecosystem. The woo… (5 marks, Explain)
• A farmer wants to improve the fertility of their soil by making compost from dead plant ma… (5 marks, Explain)
• A wildlife organisation is studying the carbon cycle in a woodland ecosystem. Explain how … (5 marks, Explain)
• A gardener notices that fruit left on the ground in summer rots much faster than fruit sto… (5 marks, Explain)
• A student investigates the rate of decomposition of dead leaves in two different compost h… (5 marks, Explain)
• A student places a healthy oak tree seedling in a dark cupboard for several days. When the… (5 marks, Explain)
• A scientist is studying wheat plants growing in two different fields. In Field A, the whea… (5 marks, Explain)
• A farmer notices that tomato plants grown in a greenhouse produce more fruit when the gree… (5 marks, Explain)
• A brewery uses yeast to produce beer. The yeast is added to a sealed container containing … (5 marks, Explain)
• A student investigates how light intensity affects the rate of photosynthesis in a pondwee… (5 marks, Explain)