How well did tossing the pennies simulate half lives?

What is the name of this hydrocarbon?

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

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