Different layers of the earth exist due to what?

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

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