Tag: science & technology

William Harvey discovered blood circulation in 1628, demonstrating that blood flows in a continuous loop through the body pumped by the heart. Edward Jenner discovered smallpox vaccine, Joseph Lister pioneered antiseptics.

William Caxton introduced the printing press to England around 1476, producing the first printed book in English. James Watt developed the steam engine, James Arkwright the spinning frame, and Isaac Newton was a physicist.

Joseph Lister pioneered antiseptic surgery in 1865, using carbolic acid (phenol) to sterilize instruments and clean wounds, dramatically reducing infection rates. Edward Jenner developed the smallpox vaccine.

John Logie Baird is credited with inventing the first practical television system in the 1920s. Faraday worked on electromagnetism, Edison on the light bulb and phonograph, and Marconi on radio telegraphy.

This question asks for the WRONG combination. James Watt did invent the steam engine, Bell did invent the telephone, and Baird did invent the television. However, J. Perkins did NOT discover penicillin - Alexander Fleming did in 1928. The Perkins combination is false.

Arachnophobia specifically refers to the fear of spiders, from the Greek root 'arachne' meaning spider. Social Phobia relates to fear of social situations, Aerophobia to flying, and Agoraphobia to open spaces where escape might be difficult.

Social Phobia (social anxiety disorder) involves intense fear of social situations where one might be judged. Aerophobia is fear of flying, Agoraphobia is fear of open spaces, and Claustrophobia is fear of confined spaces.

Aerophobia specifically refers to the fear of flying, typically in aircraft. Agoraphobia involves fear of open spaces, Claustrophobia is fear of confined spaces, and Acrophobia is fear of heights. Option C has a typo but doesn't affect the answer.

Agoraphobia is characterized by fear and avoidance of places or situations where escape might be difficult or help unavailable (like crowds, open spaces, or public transportation). The phrasing is awkward but matches the condition.

Claustrophobia is the specific fear of confined spaces like elevators, small rooms, or crowded areas. Acrophobia is fear of heights, Emetophobia is fear of vomiting, and Carcinophobia is fear of cancer.