5/6 Mark Questions & Answers (Double)

Another characteristic shown by animals is the ability to respond to their surroundings. For example, a person may withdraw their hand from a hot object. Describe the sequence of events that cause this response. (5 Marks)

A student suggested that purple flowers are more likely to be visited by bees than white flowers. Use your knowledge of natural selection to suggest how this might affect the number of purple and white flowers in the wild. (5 Marks)

Fish can be produced in large numbers on fish farms. Design an investigation to find out if the growth of fish is effected by temperature of the water in which they are farmed. (6 Marks)

Plants obtain their food by the process of photosynthesis. Explain how the structure of the leaf is adapted for its role as the organ of photosynthesis.(6 Marks) 

The peacock is a bird found in the jungle in India. The male has large colourful tail feathers that he displays during courtship to attract a female to mate with. Use your knowledge of natural selection to suggest how the peacock's tail has evolved. (5 Marks)

Farmers use bird scarers that make a sudden loud noise to frighten birds away from their crops. Design an investigation to find out if noise affects the amount birds eat. (6 Marks)

Explain the methods used to produce large numbers of fish in a fish farm. (6 Marks) 

Explain how sewage pollution can affect the plants and animals in a river. (5 Marks) 

Explain how the structure of a villus helps it perform its functions. (5 Marks) 

Fish are a good source of protein in the human diet. Describe what happens to fish protein in the gut of a human. (5 Marks) 

Describe an investigation to find out if keeping chickens indoors increases their growth. (6 Marks) 

Describe the events that follow pollination and how they lead to seed formation. (6 Marks) 

High levels of blood cholesterol can lead to narrowing of arteries. Suggest how this might affect the ability of heart function. (5 Marks) 

Explain the consequences of fertiliser containing nitrates polluting a river. (6 Marks) 

Describe an experiment you could do to find out the effect of pH on the growth of yeast. (6 Marks)  

Human activity can increases the carbon dioxide in the air. Describe the possible consequences of too much carbon dioxide in the air. (5 marks) 

A person moves from a cold room to a warm room. Describe the change that take place in the skin of this person. (6 Marks)