During precambrian time, simple life forms existed in the oceans of earth. this was followed, during the paleozoic era, by the "great explosion" when many new life forms appeared on earth in a very short period of time.

If a set of instructions that determines all of the charactersitics of an organism is comparedto a book,and a chromosme is compared to chaper in the book,then what might be compared to a paragraph in the book?

Advances in technology have enabled scientists and researchers to better study the evolutionary relationships between species

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