Images Dated 1st April 2004

Pipette tips and sample tubes

Pipette tips and sample tubes. Assorted disposable plastic pipette tips and Eppendorf sample tubes. Disposable pipette tips are used to maintain sterility when transferring samples from one place to another. A different tip is used for each sample. Eppendorf tubes are used to contain samples, for example during DNA analysis

© TEK IMAGE/SCIENCE PHOTO LIBRARY

Illustration of the parts of a flower

Flower anatomy. Illustration of parts of a flower, seen in longitudinal section. The flower is borne on a stalk, with the floral parts attached to a thickened receptacle. Sepals (green) are leaf-like structures that enclose and protect the flower when it is still a bud. Larger petals (red) are usually brightly coloured and may serve to attract pollinators. Within the petals are the male stamens, each made up of a filament and an anther bearing pollen. At centre is the female ovary (here cut through) bearing one or more ovules which may become seeds. The ovary has a long style with a stigma at its tip

© FRANCIS LEROY, BIOCOSMOS/SCIENCE PHOTO LIBRARY

Formula One World Championship: Second placed Ayrton Senna McLaren MP4/7A leads team mate Gerhard Berger McLaren MP4/7A, who retired from the

Second placed Ayrton Senna (BRA) McLaren MP4/7A leads team mate Gerhard Berger (AUT) McLaren MP4/7A, who retired from the race on lap 17 with electrical problems.
German Grand Prix, Rd 10, Hockenheim, Germany, 26 July 1992

© Sutton Motorsport Images