Which of the following bases is used in RNA but not DNA?

a. adenine

b. thymine

c. uracil

d. guanine

Medulla is a set of cells that run through a piece of hair. forensic scientists use them to determine which creature the hair came from.

Why or why not? Explain your answer using your understanding of the relationship between science and society.

Which of the following must be true of the structures of axons and muscle cells in order for nerve impulses to stimulate muscle contractions

Scientists estimate ages of rock using what?

Why is latitude an important factor in determining climate

Which of the following statements cannot be tested by science?

Can you explain how salt from the sea is returned to the land

A species of rabbit is preyed upon by foxes, which are preyed upon by wolves. Humans decide to open a hunting season on the wolf population.

Nearly all nutrients present in tropical rainforest forests are contained in the

One of the original Amish colonies rose from a ship of colonists that came from Europe. The ship’s captain, who had polydactyly, a rare dominant trait, was one of the original colonists.