17.) Which of the following statements is FALSE about mutations? a. They are almost always harmful
b. They can be caused by exposure to radiation
C. Some mutations can be beneficial
d. They change the genetic code by inserting, deleting, or substituting bases

Which coal field location is related to coal fields in the eastern united states and supports the theory of continental drift? eastern india southern africa western australia northern south america

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.

The relationship between intron and exon