Kohler and lipton first discovered a growth factor (pdgf) by:

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

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

In the practice of science, this type of reasoning is used to develop explanations.