Describe food webs as networks of interconnected food chains and construct and interpret them

Describe the terms producer, consumer, herbivore, carnivore and decomposer

Construct and interpret simple food chains

Explain why most forms of life are completely dependent on photosynthesis

Describe that the Sun is the principal source of energy input to most biological systems

Discuss potential advantages and risks of genetic modification, limited to modifying crop plants and bacteria

Outline the use of genetic modification in crop plants by inserting genes: (a) to confer resistance to herbicides (b) to confer resistance to insect pests (c) to provide additional vitamins

Explain that the gene that controls the production of human insulin has been inserted into bacterial DNA, for commercial production of insulin

Describe genetic modification as changing the genetic material of an organism by removing, changing or inserting individual genes