Images Dated 27th July 2005

Details of a Composite Order, c.1750 (brown and black ink

XYC156450 Details of a Composite Order, c.1750 (brown and black ink and wash over graphite on laid paper) by Borra, Giovanni Battista (Giambattista) (1712-86); 31.4x20 cm; Yale Center for British Art, Paul Mellon Collection, USA; (add.info.: Ionic volute and Corinthian acanthus leaf decoration;); Italian, out of copyright

© Bridgeman Images

Anemone shrimp in its anemone

Anemone shrimp (Periclimenes brevicarpalis) in its host sea anemone (Cryptodendrum adhaesivum). This shrimp has a symbiotic association with the anemone, gaining protection by hiding amongst its stinging tentacles. It is unclear if the anemone gains any benefit through hosting the shrimp, however. This type of symbiosis, where one animal gains and the other is neither helped nor harmed, is known as commensalism. The anemone and its shrimp are found in the tropical Indo-Pacific region

© GEORGETTE DOUWMA/SCIENCE PHOTO LIBRARY

False-colour SEM of secondary oocyte & polar body

Human egg. False-colour scanning electron micrograph of a human egg (primary oocyte) at the end of the first meiotic division, occurring just before ovulation. At this stage the primary oocyte is split into two cells, known as the secondary oocyte (green) and the first polar body (yellow), each containing 23 chromosomes. If after ovulation the secondary oocyte is penetrated by a spermatozoon, it completes the second meiotic division producing a fertilised mature oocyte and one polar body. The first polar body divides into two and all three polar bodies shortly degenerate. Magnification: x700 at 6x7cm size. x1115 at 4x5ins

© PROF. P. MOTTA/DEPT. OF ANATOMY/UNIVERSITY LA SAPIENZA , ROME/SCIENCE PHOTO LIBRARY