Who discovered the existence of blood capillaries linking arteries to veins, completing Harvey's circulation theory? MCQ with Answer and Explanation

Question
Who discovered the existence of blood capillaries linking arteries to veins, completing Harvey's circulation theory?
A. Robert Hooke
B. Marcello Malpighi
C. Antonie van Leeuwenhoek
D. William Harvey
Answer: Option B
Solution (By JKSSB Mock Tests)
Marcello Malpighi used primitive microscopes to observe capillaries in lung tissues in 1661.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who invented the mercury thermometer in 1714?
A. Galileo Galilei
B. Daniel Gabriel Fahrenheit
C. Anders Celsius
D. Lord Kelvin
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Correct Answer: Option B

Explanation:
Daniel Gabriel Fahrenheit invented the mercury-in-glass thermometer in 1714 and developed the Fahrenheit scale.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
The invention of the common military defensive structure known as Barbed Wire was patented in its definitive commercial form by whom?
A. Joseph Glidden
B. Eli Whitney
C. John Deere
D. Cyrus McCormick
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Correct Answer: Option A

Explanation:
Joseph Glidden patented the two-wire twisted barb lock mechanism in 1874, changing open-range farming and livestock control.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The expanding nature of the universe was discovered by which astronomer?
A. Galileo Galilei
B. Edwin Hubble
C. Albert Einstein
D. Johannes Kepler
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Correct Answer: Option B

Explanation:
Edwin Hubble discovered in 1929 that galaxies are moving away from each other, indicating that the universe is expanding.
This question belongs to: Static General Knowledge Inventions and Discoveries
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