Light micrograph of the ciliate protozoan Paramecium sp.,showing its macronucleus (deep pink). Ciliates possess two different types of nucleus; a small micronucleus (not visible here) & a larger macronucleus. The micronucleus contains the diploid set of chromosomes and is responsible for sexual reproduction,undergoing meiosis to give rise to gametic nuclei. The macronucleus is usually polyploid,containing several copies of each of the chromosomes. It deals with the metabolic & somatic cell functions & disintegrates during the early stages of sexual reproduction. Magnification: x160 at 6x4.5cm,x93 at 35mm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Michler, Astrid & Hans-Frieder |
Taille de l’image : | 3380 px × 5231 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |