Rhonda watched a video taken by a camera that was lifted into the upper atmosphere by a weather balloon. she saw the balloon pop when it reached a certain height. afterward, rhonda wondered what effect the air pressure at high altitudes has on the volume of gas in balloons. what scientific practice is rhonda performing?

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