If scientists examine a bone fragment of a wooly mammoth and find that the percentage of Carbon 14 is 12.5 percent of the amount that would have been present at death, how many half-lives will have passed and approximately how old is the bone fragment?

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a.achondroplasia b.huntington's disease c.hemophilia d.albinism

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate k-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth