absolute dating uses radioactive isotopes of atoms to find out exactly how old certain rocks and minerals are. In the past there were (more or less) atoms of radioactive Uranium

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

What is the role of dna ligase in the elongation of the lagging strand during dna replication?

What organelle makes protein for use outside the cell?