Beyond the answers - interesting background to this quiz

Mountains that shaped a continent

The Alps stretch across several European countries, including France, Switzerland, Italy, Austria and Germany, forming a natural barrier that has long influenced trade, travel and settlement. Their peaks have drawn mountaineers since the early days of alpinism, and the range remains one of Europe's most recognisable landscapes.

A quiet painter of the English countryside

John Constable painted "The Hay Wain" in 1821, depicting a rural scene on the River Stour in Suffolk. Though it drew little attention when first shown in Britain, it won a gold medal at the 1824 Paris Salon and influenced French painters. Constable preferred familiar local scenery over dramatic or exotic subjects.

A country with no coastline

Serbia is landlocked, surrounded by land on every side, which shapes its trade routes and transport links. Several other European nations share this situation, including Hungary, Austria and Switzerland. Being landlocked has not stopped these countries from building strong economies and cultural ties.

The cell's energy factories

Mitochondria are often called the powerhouse of the cell because they generate most of the cell's supply of ATP, the molecule that stores and releases energy. They have their own DNA, separate from the nucleus, and are thought to descend from ancient bacteria that were absorbed by early cells.

Penguins far from the ice

Humboldt penguins live along the Pacific coast of South America, in Chile and Peru, where cold ocean currents keep their habitat cool despite the warm latitudes. They nest in burrows or rocky crevices and are named after the explorer Alexander von Humboldt, reflecting the region's scientific history.