The correct answer is A.
Feudalism is a political system which was prevalent in Europe between the ninth and fifteenth centuries. The majority of privileges and rights were offered to the Upper class and level of the society. The King ruled and owned everything and had total control over all. His vassals (knights) were given some small parts of land but in exchange, they had to provide military protection. The serfs were lent land and they had to provide food and services to the upper classes.
Can i see what the options are?
In 1952, chemists Harold Urey and Stanley miller mixed ammonia, methane, and hydrogen in a closed container, zapped it with electrical sparks, and found that they had created many amino acids.
What are Amino Acids?
Organic substances known as amino acids have both amino and carboxylic acid functional groups. Although there are hundreds of different amino acids in nature, proteins, which are made up of alpha-amino acids, are by far the most common.
According to the positions of the primary structural functional groups, amino acids can be categorized.
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