O Level Biology

Understand diffusion as the net movement of molecules or ions from a region of their higher concentration to a region of their lower concentration (i.e. down a concentration gradient), as a result of their random movement

Understand that the energy for diffusion and osmosis comes from the kinetic energy of random movement of molecules and ions

Describe the role of water as a solvent in organisms with reference to digestion, excretion and transport

Describe that viruses can only replicate in living cells

State the main features used to place organisms into groups within the plant kingdom, limited to ferns and flowering plants (dicotyledons and monocotyledons)

State the main features used to place organisms into groups within the animal kingdom, limited to: (a) the main groups of vertebrates: mammals, birds, reptiles, amphibians, fish (b) the main groups of arthropods: myriapods, insects, arachnids, crustaceans

State the main features used to place all organisms into one of the five kingdoms: Animal, Plant, Fungus, Prokaryote, Protoctist

Construct and use dichotomous keys based on identifiable features

Describe the binomial system of naming species as an internationally agreed system in which the scientific name of an organism is made up of two parts showing the genus and species

Describe a species as a group of organisms that can reproduce to produce fertile offspring