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This species is an excellent example for symbiosis. Living together with sea anemones they keep...
A popular pet of children. They can be easily recognized by the patches behind their eyes.
Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and...
One of the most common types of Anatidae, the ancestor of the domestic duck.
The dentition of different species of mammals reflect their feeding habits.
During the evolution of vertebrates the relative development of brain areas has changed.
A film about the green iguana, the popular inhabitant of exotic terrariums.
Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.