What are some examples of biotic factors and abiotic factors

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 would be the most useful source of evidence to support mcneill's contention?

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?