To perform this test to check if gold is real, make a light, tiny scratch on the item using a small nail file. Choose a spot that is not noticeable if possible. Use a dropper to apply a small drop of nitric acid to the scratch. If there is no reaction, then the piece is probably made from real gold.
Answer:
Cell, nucleus, chromosome, gene
If bats<span> were to </span>go extinct<span>, farms could lose close to $3.7 million</span>
