The pistil collects pollen from the . A. seed
B. ovule
C. sepal
D. stamen

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

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