Published:
7. 5. 2026.
Every reflex consists of a stimulus and a response, while a conditioned reflex is learned from an existing one. In experiments with dogs, salivation was the natural response to food, but a Russian scientist trained the dogs to salivate in response to a sound instead. What was the name of this scientist?
Terms:
|Biology| |Charles Darwin| |Evolution Theory|
Published:
7. 5. 2026.
Terms:
|Gregor Mendel|
Published:
7. 5. 2026.
Terms:
|Biology| |Matthias Schleiden| |Scientific Discovery|
Published:
7. 5. 2026.
Cell research reached a major turning point in the nineteenth century. In 1838, Matthias Schleiden concluded that all plant tissues are made of cells and that the plant embryo develops from a single cell. A year later, another German scientist reached similar conclusions about animal tissue, disproving older ideas that plants and animals were structurally different. What was his name?
Terms:
|Physics|
Published:
7. 5. 2026.
Lenses are shaped pieces of glass or another transparent material that gather or spread light. Among spherical lenses, some are concave, some are plane, and some bulge outward. What are these outward-curving lenses called?
Terms:
|Physics|
Published:
7. 5. 2026.
What is the name for the emission of light caused by mechanically crushing, scratching, or rubbing a material, a phenomenon often observed in certain non-metallic minerals such as fluorite and calcite?
Terms:
|Epitaphs| |Mathematics|
Published:
6. 5. 2026.
Terms:
|Canada| |Physics|
Published:
6. 5. 2026.
What name connects the Canadian film director Egoyan with a particle made up of protons, neutrons, and electrons?
Terms:
|Physics| |Stephen Hawking|
Published:
6. 5. 2026.
Stephen William Hawking was a British theoretical physicist known for his work in cosmology, quantum gravity, and especially black holes. He also wrote popular science books explaining his ideas about the universe, including a bestseller that topped the British Sunday Times list and remained there for a record 237 weeks. What is the title of this book that mentions time?
Terms:
|Famous Quotes| |France| |Philosophy|
Published:
5. 5. 2026.