Example of selective breeding: Cows that produce lots of milk. Selective breeding to create more useful varieties of animals and plants is a form of biotechnology that human beings have used for thousands of years. Biotechnology includes any use of science or technology to alter the characteristics of a particular breed or animal.
Index fossils (also known as guide fossils, indicator fossils or zone fossils) are fossils used to define and identify geologic periods (or faunal stages).
Select the two terms that correctly complete this statement. Observable traits exhibited by an organism do not always indicate the exact genetic makeup of that organism because of recessive alleles and <span>polygenic traits</span>.
