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Austria: cities and resorts

Bacteria useful and harmful.

Significance of bacterial in nature and human life.

Fish "sea devil" - food, living conditions, reproduction

The role of bacteria in human life and in nature

The highest mountain on Earth.

What is the essence of mimicry? Mimicry: examples

As the time of one revolution of the Earth around its axis is called?

Where is the Missouri River on the map?

As the bees find their way home?

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