Explanation

The earliest known audio tape recorder was a non-magnetic, non-electric version invented by Alexander Graham Bell's Volta Laboratory and patented in 1886.

Explanation

 Allen Shepherd became the first American to travel into space in 1961, and in 1971, he walked on the Moon.

Explanation

Explanation

• The appearance of red, swollen, nasal mucosa from allergy to ragweed pollen has been mediated by: Histamine
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• During allergic reactions, basophils release two enzymes, histamine, and heparin.
• Mast cells are multifunctional bone marrow-derived tissue-dwelling cells that are the major producer of histamine in the body During allergic reactions.
  
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Explanation

• if carbamazepine is prescribed one should monitor Renal Function Tests
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• Carbamazepine is a medicine used for Epilepsy treatment.
  

Explanation

Christiaan Barnard with his team, performed the world's first human-to-human heart transplant operation on 3 December 1967

Explanation

Plaster of Paris is made by heating the mineral gypsum. When gypsum is heated to about 150°C it losses water and produces the powder of plaster of Paris.

Explanation

• Phase II reactions consist of adding hydrophilic groups to the original molecule,
• a toxic intermediate
• or a nontoxic metabolite formed in phase I,
• that requires further transformation to increase its polarity.
• These reactions include
• conjugation reactions,
• glucuronidation,
• acetylation, and
• sulfation.
  

Explanation

Johannes Kepler was an astronomer belonged to Germany. 

Explanation

He discovered the laws of gravity and three laws of motion and invented calculus.

سر آئزک نیوٹن  ایک انگریز طبیعیات دان، ریاضی دان، ماہر فلکیات، فلسفی اور کیمیادان تھے جن کا شمار تاریخ کی انتہائی اہم شخصیات میں ہوتا ہے