Question: Read this and answer the question

In 633 AD, Rashidun Arabs invaded Iran and conquered it by 651 AD, largely converting Iranian people from their indigenous faiths of Manichaeism and Zoroastrianism to Sunni Islam. Arabic replaced Persian as the official language, while Persian remained the language of both ordinary people and of literature. Iran became a major contributor to the Islamic Golden Age, producing many influential scientists, scholars, artists, and thinkers. Establishment of the Safavid Dynasty in 1501, converted the Iranian people from Sunni Islam to Twelver Shia Islam, and made Twelver Shia Islam the official religion of Iran. Safavid conversion of Iran from Sunnism to Shiism marked one of the most important turning points in Iranian and Muslim history. Starting in 1736 under Nader Shah, Iran reached its greatest territorial extent since the Sassanid Empire, briefly possessing what was arguably the most powerful empire at the time. During the 19th century, Iran irrevocably lost swaths of its territories in the Caucasus which made part of the concept of Iran for centuries, to neighboring Imperial Russia. Popular unrest culminated in the Persian Constitutional Revolution of 1906, which established a constitutional monarchy and the country's first Majles (parliament). Following a coup d'état instigated by the U.K. and the U.S. in 1953, Iran gradually became close allies with the United States and the rest of the West, remained secular, but grew increasingly autocratic. Growing dissent against foreign influence and political repression culminated in the 1979 Revolution, which led to the establishment of an Islamic republic on 1 April 1979.

What movement led to Iran becoming an Islamic republic in 1979?
Answer: 1979 Revolution
Question: Read this and answer the question

The debate on a new delimitation of the German territory started in 1919 as part of discussions about the new constitution. Hugo Preuss, the father of the Weimar Constitution, drafted a plan to divide the German Reich into 14 roughly equal-sized states. His proposal was turned down due to opposition of the states and concerns of the government. Article 18 of the constitution enabled a new delimitation of the German territory but set high hurdles: Three fifth of the votes handed in, and at least the majority of the population are necessary to decide on the alteration of territory. In fact, until 1933 there were only four changes in the configuration of the German states: The 7 Thuringian states were merged in 1920, whereby Coburg opted for Bavaria, Pyrmont joined Prussia in 1922, and Waldeck did so in 1929. Any later plans to break up the dominating Prussia into smaller states failed because political circumstances were not favorable to state reforms.

Who was the father of the Weimar Constitution?
Answer: Hugo Preuss
Question: Read this and answer the question

Hydrogen forms a vast array of compounds with carbon called the hydrocarbons, and an even vaster array with heteroatoms that, because of their general association with living things, are called organic compounds. The study of their properties is known as organic chemistry and their study in the context of living organisms is known as biochemistry. By some definitions, "organic" compounds are only required to contain carbon. However, most of them also contain hydrogen, and because it is the carbon-hydrogen bond which gives this class of compounds most of its particular chemical characteristics, carbon-hydrogen bonds are required in some definitions of the word "organic" in chemistry. Millions of hydrocarbons are known, and they are usually formed by complicated synthetic pathways, which seldom involve elementary hydrogen.

What is the form of hydrogen and heteroatoms called?
Answer:
organic compounds