Discoveries & Invention MCQs - Everyday Science Practice | PakExamPoint
Practise Discoveries & Invention MCQs in Everyday Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Discoveries & Invention MCQs and revision practice
Study Discoveries & Invention through multiple-choice questions in Everyday Science. This subtopic contains 310 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these Discoveries & Invention MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.
محدب لینس سے لیس فوٹو گرافی کیمرہ میں، مندرجہ ذیل میں سے کون سی قسم کی تصاویر فلم پر بنیں گی؟
A. Inverted and Real
B. Both A & B
C. None of these
D. Imaginary and Erect
E. Erect and Real
Check answer and explanation
Answer: Inverted and Real
Explanation In a photographic camera fitted with a convex lens, a real and inverted image is formed on the film. Convex lenses (also called converging lenses) always form real and inverted images when the object is placed beyond the focal point. In a camera, the object (the scene being photographed) is positioned beyond the lens's focal point, Ensuring that the light rays converge to form a real, inverted image on the film.
Explanation Perseverance landed on Feb. 18, 2021. is a car-sized Mars rover designed to explore the Jezero crater on Mars as part of NASA's Mars 2020 mission. It was manufactured by the Jet Propulsion Laboratory and launched on July 30, 2020 As of 23 July 2023, Perseverance has been active on Mars for 861 sols .
اس ایمبریولوجسٹ کا نام بتائیں جس نے بھیڑوں کی پہلی بڑی آنت 'ڈولی' بنائی؟
A. Albert Einstein
B. Ian Wilmut
C. Flemming
D. Curtist Youngs
E. Hugo de Vries
Check answer and explanation
Answer: Ian Wilmut
Explanation Dolly was the world's first cloned sheep. Dolly was born on 5 July 1996. Dolly was a female domestic sheep, and the first mammal cloned from an adult somatic cell, using the process of nuclear transfer. Dolly was cloned by Ian Wilmut.
Explanation James Watt , a Scottish engineer, patented improvements to the steam engine in 1781. He significantly enhancing its efficiency and power , and revolutionizing industry and transportation.
Explanation Structure of DNA was discovered by James Watson and Francis Crick in 1953. They discovered the double-helix structure of DNA using X-ray crystallography data. Their discovery revealed the double-helix structure of DNA , where two complementary strands are twisted together with sugar and phosphate molecules, and the nitrogenous bases (adenine, thymine, cytosine, and guanine) pair in a specific manner.
Explanation The Centigrade scale was developed by Anders Celsius in 1742 . It was later renamed the Celsius scale , with 0°C as the freezing point and 100°C as the boiling point of water.
Explanation The human body's system of blood circulation was discovered by William Harvey. He was an English physician. He discovered the Circulatory System in 1628 . ****
Explanation Oxygen was discovered in 1774 by English chemist Joseph Priestley, He isolated it by heating mercuric oxide and called i t "dephlogisticated air". Oxygen was discovered independently by Carl Wilhelm Scheele (around 1772)