Which of the following does not contain a coinage metal?
a. silver and gold
b. zinc and gold
c. copper and silver
d. copper and gold

Witch type of microscope is used to view very small cell components like proteins and dna?

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.

Approximately what portion of the foods that we eat have been genetically modified in some way? a.fewer than 10% b.about 50% c.nearly 100%