1.   Bacteria show how natural selection builds its defences.

2.   Unless expensive sea defences were built, low-lying coastal regions would be permanently submerged.

3.   People have been mobilised to build defences and drain flooded land as heavy rains continue to fall.

4.   If these are some of the likely causes of wars in the future, how do we build our defences against them?

5.   Her defence has been built on evidence of flaws in the testing procedure and independent medical examinations showing she did not take any banned substance.

6.   Alessandro Nesta is the rock on which the Italian World Cup defence will be built.

7.   The rock around which coach Victor Pua will seek to build his defence, captain Paolo Montero has been an ever-present for Uruguay for close to a decade.