When a Gram positive bacterial culture is too old, it is possible that the Gram stain reaction will not be accurate. This is because the cell wall of an old bacterial cell has become weakened. Therefore, the cell wall becomes “leaky” and is more likely to no longer be able to retain the primary dye during the Gram stain procedure.

Ayoung boy has been found and police are trying to locate his family they take a dna sample from him and begin collec dna samples from families who have missing children if police use dna samples only from the fathers, which type of dn technology can they use to identify the boy's parent? y-chromosome analysis omtdna (mitochondrial dna) analysis vntrs (variable tandem repeats) o pcr (polymerase chain reaction) analysis

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

In sheep, the allele for belly fur (a) is dominant to the allele for no belly fur (a). a mother with the genotype aa and a father with the genotype aa produce an offspring.