Seeds and germination

Dicotyledons have two embryonic leaves (cotyledons), while monototyledons have only one.

Freshwater pearl mussel

A species of mollusc widespread in freshwaters.

Vertebrate brain evolution

During the evolution of vertebrates the relative development of brain areas has changed.

Pearls

Pearls, often used as gemstones, are the by-products of certain molluscs' protective mechanisms.

Fat-tailed scorpion

The fat-tailed scorpion is one of the world's most dangerous scorpions.

Woolly mammoth

Extinct proboscidea closely related to today's elephants, often hunted by prehistoric man.

Sharks

A group of fish characterised by a cartilaginous skeleton, well-known species include the great white shark and the great hammerhead shark.

Apatosaurus

Long-necked herbivorous dinosaur with a robust body.

Trilobites

The ancestors of Arachnida and Crustacea belonged to the class Trilobita.

Diversity of light-detecting organs

Several analogous types of eyes have developed independently through convergent evolution.

European mole

Moles are small subterranean mammals with modified, spade-like forelegs.

Red deer

Red deer are even-toed ungulates, ruminants. Their males have spectacular antlers.

Common earthworm

The anatomy of annelids is demonstrated through the example of the common earthworm.

European honeybee

Honeybees produce a sweet and nutritious substance, honey.

Sponge

The most ancient group of animals, they live underwater, lack real tissues and body symmetry.

Amoeba proteus

Widespread heterotrophic unicellular organisms with constantly changing shapes

Edible frog

This animation demonstrates the anatomy of amphibians through the example of a common species of frogs.

Types of dentition in mammals

The dentition of different species of mammals reflect their feeding habits.

Comparison of real fruits and pseudofruits

The pericarp of real fruits develops from the carpel, while the pericarp of pseudofruits develops from other parts of flowers.

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