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Moles are small subterranean mammals with modified, spade-like forelegs.
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 most ancient group of animals, they live underwater, lack real tissues and body symmetry.
A widespread heterotrophic unicellular organism with constantly changing shape.
This animation demonstrates the anatomy of amphibians through the example of a common species of frogs.
This animation demonstrates how horse chestnut trees change throughout the seasons.
Chlorophyll is a photosensitive green pigment found in plants; it absorbs light energy, thus plays a vital role in photosynthesis.
The pericarp of real fruits develops from the carpel, while the pericarp of pseudofruits develops from other parts of flowers.
The withdrawal reflex is a spinal reflex that ensures moving away from potentially damaging stimuli.
A type of herbivorous dinosaur easily recognisable by its large frill and three horns which lived in the Cretaceous period.
The dentition of different species of mammals reflect their feeding habits.
A type of prehistoric reptile having bony plates on its back, which aided thermoregulation.
An extinct group of Cephalopoda, with solid external skeletons. They are excellent index fossils.
A mammal with features typical of reptiles: it lays eggs and has a cloaca.
The ancestors of Arachnida and Crustacea belonged to the class Trilobita.
A group of fish characterised by a cartilaginous skeleton, well-known species include the great white shark and the great hammerhead shark.
Several analogous types of eyes have developed independently through convergent evolution.
A prehistoric flying reptile, similar to birds. However, there is no direct evolutionary link between the two.
Concave and convex lenses are used for the correction of short-sightedness and long-sightedness.
Producing speech requires the synchronised operation of several cortical centres.