Which of these is a benefit of fuel cell cars? A. Fuel cell cars reduce the use of fossil fuels.
B. Hydrogen fuel is volatile.
C. Fuel cell cars are quickly recharged.
D. Hydrogen fuel is a limited resource.​

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Enzymes affect the reactions in living cells by changing the

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?