Jonas Salk was an important American medical researcher and virologist, who is mostly known for developing the first successful polio vaccine in 1955.
-Gvcci
To study history artifacts are needed and often they are lost to history because they have been buried and not found, are under water, are broken or ruined in some way, the site has been raided by thieves and items taken, war often interrupts digs or the archeological sites are destroyed by armies and information is lost. These are just a few things that makes it hard to study early humans and things are found all the time that historians learn from.
Historians need good sources (preferably, written sources) on which to base their studies. If early societies did not leave any written information , historians have to go by other indications like the remnants of villages and temples and perhaps some drawings or carvings. Sometimes these give an indication how societies were (or might have been) organized, but without written confirmation you can never be completely sure. so is that help full or not
<span>a) citizens are represented as a legislature. </span>
Answer:
George Washington (February 22, 1732 – December 14, 1799) commanded the Continental Army in the American Revolutionary War (1775–1783). After serving as President of the United States (1789 to 1797), he briefly was in charge of a new army in 1798.
In 2003, the Court overturned a Texas anti-sodomy law as a violation of the right to privacy and the Equal Protection Clause of the Fourteenth Amendment. In Lawrence v. Texas (2003), theSupreme Court ruled that state laws banning homosexual sodomy are unconstitutional as a violation of the right to privacy.
