Light micrograph of different species of shells belonging to the order known as Foraminifera. It comprises unicellular protozoans whose shells form an important component of chalk and of many deep sea oozes. They live in the sea or salt-water lakes. Their shells are composed of several chambers which are usually penetrated by pores through which the cellular contents (protoplasm) are extruded. In previous geological ages Foraminifera occurred in such enormous numbers that their shells have formed immense deposits. The shells shown here are made of calcium carbonate. Magnification: x30 at 35mm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Michler, Astrid & Hans-Frieder |
Bildgröße: | 5311 px × 3607 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |