The thing which was a major factor that threatened the major unity in the United States in the mid-19th century was:
<h3>The Great Depression</h3>
This refers to the period around 1929 in the United States which has a profound effect on the national economy.
This led to the failure of many banks, increase in unemployment and high deflation rates which all threatened the national unity.
Read more about Great Depression here:
brainly.com/question/441267
rushed writing in England's
Answer:
More resistant
Explanation:
They communicate more effectively with one another and exchange information more quickly. In addition, they can switch on and off genes that make them harmful. "These properties make the bacteria more resistant to antibiotics and to the host's immune response.
