Why do Galapagos sharks lie still on the ocean floor? O A. They are being social.

OB. Scientists still don't know why.

O C. They are sleeping.

OD. They are waiting for food.

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

All phases of matter may have a fixed mass

Someone with these questions! pls 30 pts