Please help me! Natural selection with short/long leg lizard

What is thought to have caused the mass extinction at the end of the cretaceous period?

Variety of living organisms; includes genetic, species, and ecological types.

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