1.   Accepting then that the material making up the mantle can behave as a viscous liquid, this raises an interesting possibility.

2.   Economic theory assumed that the company, like the individual entrepreneur, behaved as a profit-maximizing unit.

3.   It is this that allows the NMDA receptor to behave as a molecular coincidence detector.

4.   Nothing unusual - clocks behaving as before, keeping good time and continuing to emit their light beams.

5.   The ballerina has to behave as graciously and confidently as her partner.

6.   The HeLa cell nucleus continues to behave as before.