Which of the following objects has polarity? A
the Earth, which has magnetic north and south poles

B
the city of Chicago, which has a North and Southside

C
a map of the country, which has a compass pointing north

D
an unmagnetized block of metal, which has a top and a bottom

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean