4.11 - Understand the biological consequences of pollution of air by sulphur dioxide and by carbon monoxide. - Sulphur dioxide reacts with rainwater to form sulphurous acid, which falls as acid rain. - Carbon monoxide is created as a result of incomplete combustion. •...
CROP PLANTS (5.1 - 5.4) 5.1 - Describe how glasshouses and polythene tunnels can be used to increase the yield of certain crops. - Conditions in glasshouses and polythene tunnels can be controlled. - This means that all the limiting factors for plant growth can be set...
5.10 - Understand that plants with desired characteristics can be developed by selective breeding. - Plants can be bred selectively by choosing plants with desired characteristics (e.g. colour, size of fruit) through pollination. 5.11 - Understand that animals with...
- Vector: (a virus or plasmid) that transfers genetic material into a cell, or from one bacterium to another. - Recombinant DNA: Genetic material formed by recombination (by restriction enzymes and ligase enzymes). - When a virus or plasmid is inside a host cell, it...
5.17 - Describe the process of micropropagation (tissue culture) in which small pieces of plants (explants) are grown in vitro using nutrient media. - Explants (small pieces of plant) are grown in vitro in agar jelly as it contains nutrients (amino acids and glucose)....