A scientist is studying a radioactive element that has a half-life of 63 years. Choose the correct answers from the drop-down menus to complete each statement about the element. It will take
blank
years for half of the sample to decay.

In 189 years, blank
of the sample will be left.

Scientists can figure out how old a sample is by multiplying the blank
by the length of the half-life.

Nucleic acid certain protein cell membranes certain carbohydrates

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

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air