Who built the first cities in China?

1 answer:

7 0

The first cities developed in the region known as Mesopotamia between 4500 and 3100 BCE. The city of Uruk, today considered the oldest in the world, was first settled in c. 4500 BCE and walled cities

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In the late 19th century, which of the following reasons suggested that the United States needed to expand?

Llana [10]

Answer:

i believe the answer Is manifest destiny

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3 years ago

Adolescents who are creative are likely to have had parents who:

Flura [38]

The answer in the question above would likely be letter a, it is because people who are creative tend to explore more things in which they will discover that will expand their thoughts in the world, making creativity step in, in which, this will help an individual create new things with the use of his or her imaginations. Their parents were likely to encourage their curiosity during childhood, in which they are bounded to discover new things that will open their imagination that could lead to creativity.<span />

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4 years ago

True or false? in alcohol abuse, physical dependence in more pronounced than in alcoholism.

Fantom [35]

<span>True. Physical dependence on alcohol is more pronounced and evident. This is because of the addictive factor of the alcohol, which similar to some drugs, is a depressant. This substance usually inhibits any sympathetic neural activity however disrupts the cognitive functioning of a person. </span>

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3 years ago

Several students have been practicing drawing their models of nucleotides. Whose model do you think is most consistent with the

RSB [31]

The first description of the DNA (deoxyribonucleic acid)chain was done by Watson and Crick in 1953, the nucleotides that constitute the DNA are four: cytosine (C), guanine (G), timine (T) and adenine (A). When doing a model is essential to remember that cytosine ONLY joins guanine and timine only link adenine, this is due to the size and chemical properties of each molecule. Later, another related and similar and molecule was discovered, the ribonucleic acid or RNA, which also is constructed by nucleotides.

In both cases, the nucleotides are compound of 3 main components: a nitrogen base, a pentose and a phosphate. When the molecule lacks the phosphate group, is called nucleoside. Depending on the chain ( DNA or RNA) the nitrogen base derives from purine (adenine and guanine) or pyrimidine (cytosine or timine) just in the RNA instead of timine is uracil (U)

The union is established between adjacent molecules through the phosphate, while among each other through the nitrogen base-remember C=G and T or U=A. The core of each molecule is the pentose. Therefore the best representation of the molecule is attached

References

Watson, J. D., & Crick, F. H. (1953, January). The structure of DNA. In Cold Spring Harbor symposia on quantitative biology (Vol. 18, pp. 123-131). Cold Spring Harbor Laboratory Press.

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3 years ago

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How was the work of missionaries vital in the spread of Christianity through the Roman empire?

mrs_skeptik [129]

Missionaries spread the word of Jesus.

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3 years ago