What is any method of measuring the age of an object or event in years, such as using atomic half-life?

On a floor there are several 1-4 mm elongated drops leading away from a body lying in a pool of blood. the the forward wall there is a sigzag pattern and on the walls to the right side there is a linear patter

What is the genotype for the following phenoytpe: a male fruit fly that is heterozygous for eye color and homozygous dominant for wing size. a eeww b eeww c eeww d wewe

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.