Jacob is unsure about how to focus a slide under the microscope. What would be Jacob's best course of action? Ask the teacher for instructions.
O Ask his lab partner for instructions.
O Watch another student, and copy what he or she does.
O Use the trial-and-error method until the slide focuses.

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