Answer:
A. Speaker 2
Explanation:
The Articles of Confederation is known as the first written American constitution. It has its origins in times of war, also, its development was delayed since people were afraid of central authority and states demanded their lands, until it was sanctioned on March 1, 1781. These articles recognized the states' sovereignity and independency, leaving Congress as an auxiliary resource to solve certain issues, and not having the power to collect taxes or mint money. It was a weak central government, which eventually led to the Constitutional Convention in 1787 that modified and elaborated new federal laws.
Answer:
test the mutagenic effects of chemicals
Explanation:
Ames test is a biological investigation to evaluate the mutagenic potential of any chemical compounds. It is a widely used method which takes help of bacteria to test whether a chemical can bring mutations in DNA of the test organism.
It detects if a certain chemical can bring about a reversion mutation in the his- bacteria.
