Which measurement do geologists use to find the absolute age of once-living things? amount of decayed daughter elements
total number of half-lives for the element potassium
age of ancient rocks located near the remains
amount of carbon-14 and nitrogen-14 in the remains

amount of carbon-14 and nitrogen-14 in the remains

Explanation:This is called radiocarbon dating. It is used for once-living things between 100 and 50,000 years old.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.