GK - Inventions and Discoveries
26.
Who discovered nucleus in the cell ?
Answer
The nucleus was also described by Franz Bauer in 1804 and in more detail in 1831 by Scottish botanist Robert Brown. Brown was studying orchids under microscope when he observed an opaque area, which he called the areola or nucleus, in the cells of the flower's outer layer.
Answer :
Option CExplanation :
The nucleus was also described by Franz Bauer in 1804 and in more detail in 1831 by Scottish botanist Robert Brown. Brown was studying orchids under microscope when he observed an opaque area, which he called the areola or nucleus, in the cells of the flower's outer layer.
27.
Who invented the printing press?
Answer
In Germany, around 1440, goldsmith Johannes Gutenberg invented the printing press, which started a printing revolution.
Answer :
Option AExplanation :
In Germany, around 1440, goldsmith Johannes Gutenberg invented the printing press, which started a printing revolution.
28.
Ralph Samuelson was only 18 when he invented a sporting item in 1922. What was that?
Answer
In June 1922, 18-year-old adventurer Ralph Samuelson of Minnesota proposed that if you could ski on snow, then you could ski on water. Ralph first attempted water skiing on Lake Pepin in Lake City, Minnesota, towed by his brother Ben.
Answer :
Option CExplanation :
In June 1922, 18-year-old adventurer Ralph Samuelson of Minnesota proposed that if you could ski on snow, then you could ski on water. Ralph first attempted water skiing on Lake Pepin in Lake City, Minnesota, towed by his brother Ben.
29.
Blood groups were discovered by
Answer
The ABO blood types were discovered by Karl Landsteiner in 1901, for which he received the Nobel Prize in Physiology or Medicine in 1930.
Answer :
Option DExplanation :
The ABO blood types were discovered by Karl Landsteiner in 1901, for which he received the Nobel Prize in Physiology or Medicine in 1930.
30.
Who is the english physicist responsible for the "Big Bang Theory"?
Answer
George Gamow's work led the development of the hot "big bang" theory of the expanding universe.
Answer :
Option CExplanation :
George Gamow's work led the development of the hot "big bang" theory of the expanding universe.
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