The term "Roaring '20s" refers to the decade of the 1920s in the United States, which was a time of much economic growth, as well as much social and cultural change.
In the 1920s, cities grew rapidly and industry was growing immensely in the United States. Jazz and other forms of entertainiment (like radio) were expanding and reaching new audiences. Women were becoming more involved in public life. The stock market was a place of much speculation and investment -- too much, as it turned out. The stock market crashed in 1929. America had thought it was in great times during the Roaring '20s. But then everything came crashing down and minds and hearts were depressed, as the country entered into the next decade and an economic tragedy known as the Great Depression.
The machine clearly would, and it worked even harder to embrace ... and the Tammany organization actively courting their support with offers of food, ... foes, who saw political influence by poor immigrants as a crime in itself.
The main cause of the second industrial revolution was, natural resources, abundant labor supply, strong government policy and new sources of power.
Answer:
True
Explanation:
During the late 1950s and early 1960s, Werner Arber and several others extended the work of an earlier Nobel laureate, Salvador Luria, who observed that bacteriophages (viruses that infect bacteria) not only induce hereditary mutations in their bacterial hosts but at the same time undergo hereditary mutations themselves. Werner Arber’s research was concentrated on the action of protective enzymes present in the bacteria, which modify the DNA of the infecting virus e.g., the restriction enzyme, so-called for its ability to restrict the growth of the bacteriophage by cutting the molecule of its DNA to pieces.
