when you're doing an experiment on enzymes when you add acid+saliva+starch+iodine why does the colour change to blue black​

Some of the money that people deposit into a bank eventually becomes a interjection into the economy when the bank

How were royal colonies different from corporate colonies? what was the king's privy council? what role did it play in the house of burgesses? what led to the creation of the rhode island colony? how was the colony governed?

What blood condition is caused by iron deficiency?