Scientists have found that the carbon-14 content of an unknown prehistoric sample was reduced to one-half. What best describes the identity of the sample?

What is the universe best classified as

Brown eyes is dominant to light eyes. Mr. O'Ryan has blue (light) eyes. Mrs. O'Ryan is heterozygous for brown eyes. What are the color possibilities of their son?

Acer japonica, Acer rubrum, and Acer saccharum are

A boy exerts an average force of 65 n when he lifts a box 1.2 meters. How much work does he do?

Select all correct answers. A phylogenetic tree may represent relationships among A. populations B. taxa at levels above species C. species D. genes

The biomolecule described is a

Chemical reactions in cells are faster than the same reactions outside cells. True False

What are WBCs and what do they create to fight off infections?

Which term names the replacement of living cells with minerals to form a rock-like fossil of a living thing? A. mold fossil B. petrified fossil C. cast fossil D. trace fossil

What is the diffrence between working in a field or laboratory