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Carrier of genetic information in cells.
Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.
The process of the decay of unstable nuclei is called radioactivity.
A heterocyclic organic compound, its derivatives are thymine, cytosine and uracil.
Widespread heterotrophic unicellular organisms with constantly changing shapes
Common ciliated eucaryotic unicellular organisms widespread in freshwaters.
A heterocyclic aromatic organic compound, its derivatives include guanine and adenine.
A type of large freshwater crayfish widespread in Europe.
This animation demonstrates the anatomy of spiders through the example of a common European species.
The cockchafer (or maybug) is a widespread bug in Europe. Its larvae, known as chafer grubs are considered a pest.
The anatomy of annelids is demonstrated through the example of the common earthworm.
Jellyfish are free-swimming marine animals, a species of Cnidaria, the most ancient group of Eumetazoans.
The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for life on Earth.
One of the most common types of flatworms.
The most ancient group of animals, they live underwater, lack real tissues and body symmetry.