What's the main term used to locate in the alphabetic index for acute perforated gastrojejunal ulcer

Does masterbation affect height growth or loss of growth hormone?

We all have different forms of genes from our parent(s).what are these different forms called? a.alleles b.characters c.dna d.resources

According to the article, what valid claim came from the national research council? there is no association between fluoride exposure and increased cancer risk in humans. there is a possible link between fluoride exposure and increased cancer risk in humans. there is a definite link between fluoride exposure and increased cancer risk in humans.