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Which of the following diseases can be prevented by inoculation? rubella, syphilis, tuberculosis, polio, gonorrhoea, common cold, measles, haemophilia, mumps.
Give two examples of diseases which can be spread by contaminated drinking water. How can the spread of such diseases be prevented?
What is the distinction between ‘breathing’ and ‘respiration’? What part do ‘ventilation’ and ‘gaseous exchange’ play in these processes?
State the ways in which (a) all plant cells, (b) some plant cells differ from animal cells.
Name one biotechnological process which makes use of protozoa. From what type of organisms are antibiotics obtained?
State two ways in which protozoa differ from bacteria. Which body cells are attacked by the malarial parasite?
Name three diseases caused by viruses. By what method may virus diseases be prevented?
What kind of food is most likely to contain Salmonella bacteria? What illness is caused by Salmonella typhimurium?
What is meant by the expression ‘infant mortality’? What is meant by a ‘fertility rate of 3’?
Give two examples of artificial ecosystems. What two biotic factors could affect an antelope living in the Serengeti?
In what ways can we try to protect a species from extinction? Apart from conserving individual plants and animals, what else needs to be conserved.
In what way do chlorofluorocarbons (CFCs) cause global problems? Which part of the carbon cycle is responsible for the increasing concentration of carbon dioxide in the atmosphere.
What are the principal sources of excessive nitrate and phosphate in rivers and lakes?
What processes remove nitrates from the soil? In what ways do farmers try to improve the quality of (i) their soil, (ii) their crop plants?
What characteristics might a breeder select for in a cereal crop, a farm animal?
Explain why identical twins will have the same genotype. Continuous variation results from environmental effects.
In which three of the following cells is mitosis unlikely to occur? a sperm cell, an epithelial cell of a villus, a hair cell, a cell in the red bone marrow, a red blood cell.
What is plaque? From which part of the teeth is it particularly important to remove plaque. What gum conditions may result from a failure to remove plaque?
Explain the effects of the failure of the pancreas to produce sufficient-insulin. How is this condition treated?
Name the two structures which make up the central nervous system.
List four stimuli which can be detected by the skin. By what means do we become aware of a stimulus? Name the four taste sensations that we can distinguish.
Name one inorganic component of bone. Name three parts of the body where smooth (involuntary or unstriated) muscle may be found.
What is 'vasoconstriction'? What are the effects of vasoconstriction in the skin?
How will you destarch the leaves of a potted plant? How would you check that the destarching had been effective?
Write down the examples of chemical reactions which are catalysed by enzymes in the course of brewing.