a determination of the relative age of rock layers reached by studying fossils transfer of heat energy between heat substances that are in direct contact with one another organelle found in some organisms that carries out photosynthests |
protein that speeds up biological reactions |
bending of light as it passes around the edge of an object |
Organelle that regulates the production of proteins and contains genetic material |
chemical reaction in which heat is absorbed Set of chemical reactions in the cells of living organism to sustain life |