How are increasing levels of CO2 responsible for warming the surface of Earth?

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

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 follow describes a disadvantage secondary sources have compared to primary sources?