Answer:
The correct option is : <u>C. prevent the immune system from responding to self-antigens</u> and <u>D. prevent excessive response to foreign antigens </u>
Explanation:
<u>Immune tolerance</u>, also known as the immunotolerance, of the immune system, is a state of unresponsiveness to the cells or tissues that are capable of eliciting an immune response in an organism.
Tolerance is classified into <u>central and peripheral. </u>The central tolerance is induced in the thymus and bone marrow. Whereas, the peripheral tolerance is induced in the other tissues and the lymph nodes.
<u>Central tolerance of the immune system is responsible for discriminating the self cells from the non-self cells of the body and thus prevents the body from responding to self-antigens.</u>
<u>Peripheral tolerance of the immune system is responsible for preventing excessive response of the immune system to foreign antigens like allergens.</u>
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Answer:
I believe it was Woodrow Wilson
Explanation:
From 1892 to 1954, over twelve million immigrants entered the United States through the portal of Ellis Island, a small island in New York Harbor. Ellis Island is located in the upper bay just off the New Jersey coast, within the shadow of the Statue of Liberty.
The answer is B, public opinion polls
Answer:
True.
Explanation:
Urbanization can be defined as the development of a place or region into an urban area. According to history Urbanization has its root at first in Europe continent before spreading to America and the time in which the world record more urbanization was during the period known as greco-roman period.
Because of railways and the presence of iron ores boosted the urbanization in the United States of America.
